Nuclear arms race

From Wikipedia, the free encyclopedia

 

United States and Soviet Union/Russia nuclear weapon stockpiles

 

The nuclear arms race was an arms race competition for supremacy in nuclear warfare between the United States, the Soviet Union, and their respective allies during the Cold War. During this period, in addition to the American and Soviet nuclear stockpiles, other countries developed nuclear weapons, though none engaged in warhead production on nearly the same scale as the two superpowers.

World War II

The first nuclear weapon was created by the United States of America during the Second World War and was developed to be used against the Axis powers. Scientists of the Soviet Union were aware of the potential of nuclear weapons and had also been conducting research on the field.

The Soviet Union was not informed officially of the Manhattan Project until Stalin was briefed at the Potsdam Conference on July 24, 1945, by U.S. President Harry S. Truman, eight days after the first successful test of a nuclear weapon. Despite their wartime military alliance, the United States and Britain had not trusted the Soviets enough to keep knowledge of the Manhattan Project safe from German spies: there were also concerns that, as an ally, the Soviet Union would request and expect to receive technical details of the new weapon.

When President Truman informed Stalin of the weapons, he was surprised at how calmly Stalin reacted to the news and thought that Stalin had not understood what he had been told. Other members of the United States and British delegations who closely observed the exchange formed the same conclusion.

In fact Stalin had long been aware of the program, despite the Manhattan Project having a secret classification so high that, even as Vice President, Truman did not know about it or the development of the weapons (Truman was not informed until shortly after he became president). A ring of spies operating within the Manhattan Project, (including Klaus Fuchs and Theodore Hall) had kept Stalin well informed of American progress. They provided the Soviets with detailed designs of the implosion bomb and the hydrogen bomb. Fuchs' arrest in 1950 led to the arrests of many other suspected Russian spies, including Harry Gold, David Greenglass, and Ethel and Julius Rosenberg.

In August 1945, on Truman's orders, two atomic bombs were dropped on Japanese cities. The first bomb was dropped on Hiroshima, and the second bomb was dropped on Nagasaki by the B-29 bombers named Enola Gay and Bockscar respectively. 

Shortly after the end of the Second World War in 1945, the United Nations was founded. During the United Nation's first General Assembly in London in January 1946, they discussed the future of Nuclear Weapons and created the United Nations Atomic Energy Commission. The goal of this assembly was to eliminate the use of all Nuclear weapons. The United States presented their solution, which was called the Baruch Plan. This plan proposed that there should be an international authority that controls all dangerous atomic activities. The Soviet Union disagreed with this proposal and rejected it. The Soviets' proposal involved universal nuclear disarmament. Both the American and Soviet proposals were refused by the UN.

Early Cold War

Warhead Development

In the years immediately after the Second World War, the United States had a monopoly on specific knowledge of and raw materials for nuclear weaponry. American leaders hoped that their exclusive ownership of nuclear weapons would be enough to draw concessions from the Soviet Union but this proved ineffective. 

Just six months after the UN General Assembly, the United States conducted its first post-war nuclear tests. This was called Operation Crossroads. The purpose of this operation was to test the effectiveness of nuclear explosions on ships. These tests were performed at Bikini Atoll in the Pacific on 95 ships, including German and Japanese ships that were captured during World War II. One plutonium implosion-type bomb was detonated over the fleet, while the other one was detonated underwater. 

Behind the scenes, the Soviet government was working on building its own atomic weapons. During the war, Soviet efforts had been limited by a lack of uranium but new supplies in Eastern Europe were found and provided a steady supply while the Soviets developed a domestic source. While American experts had predicted that the Soviet Union would not have nuclear weapons until the mid-1950s, the first Soviet bomb was detonated on August 29, 1949, shocking the entire world. The bomb, named "First Lightning" by the West, was more or less a copy of "Fat Man", one of the bombs the United States had dropped on Japan in 1945.

Both governments spent massive amounts to increase the quality and quantity of their nuclear arsenals. Both nations quickly began the development of a hydrogen bomb and the United States detonated the first hydrogen bomb on November 1, 1952, on Enewetak, an atoll in the Pacific Ocean. Code-named "Ivy Mike", the project was led by Edward Teller, a Hungarian-American nuclear physicist. It created a cloud 100 miles wide and 25 miles high, killing all life on the surrounding islands. Again, the Soviets surprised the world by exploding a deployable thermonuclear device in August 1953 although it was not a true multi-stage hydrogen bomb. However, it was small enough to be dropped from an airplane, making it ready for use. The development of these two Soviet bombs was greatly aided by the Russian spies Harry Gold and Klaus Fuchs.

On March 1, 1954, the U.S. conducted the Castle Bravo test, which tested another hydrogen bomb on Bikini Atoll. Scientists significantly underestimated the size of the bomb, thinking it would yield 5 megatons. However, it yielded 14.8 megatons, which is the largest nuclear explosion tested by the U.S. The explosion was so large the nuclear fallout exposed residents up to 300 miles away to significant amounts of radiation. They were eventually evacuated, but most of them experienced radiation poisoning and resulted in one death from a crew member of a fishing boat 90 miles from the explosion. 

The Soviet Union detonated its first "true" hydrogen bomb on November 22, 1955, which had a yield of 1.6 megatons. On October 30, 1961, the Soviets detonated a hydrogen bomb with a yield of approximately 58 megatons.

Arms Race

With both sides in the "cold war" having nuclear capability, an arms race developed, with the Soviet Union attempting first to catch up and then to surpass the Americans.

Russian Deputy Foreign Minister Sergey Ryabkov warned about a risk of nuclear war, as the negative dynamics was quite noticeable in 2018. He urged the nuclear states to build channels on forestalling potential incidents, in order to lower the risks.

Delivery Vehicles

Strategic bombers were the primary delivery method at the beginning of the Cold War.

Missiles had long been regarded the ideal platform for nuclear weapons, and were potentially a more effective delivery system than bombers. Starting in the 1950s, medium-range ballistic missiles and intermediate-range ballistic missiles ("IRBM"s) were developed for delivery of tactical nuclear weapons, and the technology developed to the progressively longer ranges, eventually becoming intercontinental ballistic missiles (ICBMs). On October 4, 1957, the Soviet Union showed the world that they had missiles able to reach any part of the world when they launched the Sputnik satellite into Earth orbit. The United States launched its first satellite Explorer 1 on January 31, 1958. 

Meanwhile, submarine-launched ballistic missiles were also developed. By the 1960s, the "triad" of nuclear weapon delivery was established, with each side deploying bombers, ICBMs, and SLBMs, in order to insure that even if a defense was found against one delivery method, the other methods would still be available.

Some in the United States during the early 1960s pointed out that although all of the individual components of nuclear missiles had been tested separately (warheads, navigation systems, rockets), it was infeasible to test them all combined. Critics charged that it was not really known how a warhead would react to the gravity forces and temperature differences encountered in the upper atmosphere and outer space, and Kennedy was unwilling to run a test of an ICBM with a live warhead. The closest thing to an actual test was 1962's Operation Frigate Bird, in which the submarine USS Ethan Allen (SSBN-608) launched a Polaris A2 missile over 1,000 miles to the nuclear test site at Christmas Island. It was challenged by, among others, Curtis LeMay, who put missile accuracy into doubt to encourage the development of new bombers. Other critics pointed out that it was a single test which could be an anomaly; that it was a lower-altitude SLBM and therefore was subject to different conditions than an ICBM; and that significant modifications had been made to its warhead before testing.

Mutual Assured Destruction (MAD)

By the 1950s both the United States and the Soviet Union had enough nuclear power to obliterate the other side. Both sides developed a capability to launch a devastating attack even after sustaining a full assault from the other side (especially by means of submarines), called a second strike. This policy became known as Mutual Assured Destruction: both sides knew that any attack upon the other would be devastating to themselves, thus in theory restraining them from attacking the other. 

Both Soviet and American experts hoped to use nuclear weapons for extracting concessions from the other, or from other powers such as China, but the risk connected with using these weapons was so grave that they refrained from what John Foster Dulles referred to as brinkmanship. While some, like General Douglas MacArthur, argued nuclear weapons should be used during the Korean War, both Truman and Eisenhower opposed the idea.

Both sides were unaware of the details of the capacity of the enemy's arsenal of nuclear weapons. The Americans suffered from a lack of confidence, and in the 1950s they believed in a non-existing bomber gap. Aerial photography later revealed that the Soviets had been playing a sort of Potemkin village game with their bombers in their military parades, flying them in large circles, making it appear they had far more than they truly did. The 1960 American presidential election saw accusations of a wholly spurious missile gap between the Soviets and the Americans. On the other side, the Soviet government exaggerated the power of Soviet weapons to the leadership and Nikita Khrushchev.

Initial nuclear proliferation

In addition to the United States and the Soviet Union, three other nations, the United Kingdom, People's Republic of China, and France developed nuclear weapons during the early cold war years. 

In 1952, the United Kingdom became the third nation to possess nuclear weapons when it detonated an atomic bomb in Operation Hurricane on October 3, 1952, which had a yield of 25 kilotons. Despite major contributions to the Manhattan Project by both Canadian and British governments, the U.S. Congress passed the Atomic Energy Act of 1946, which prohibited multi-national cooperation on nuclear projects. The Atomic Energy Act fueled resentment from British scientists and Winston Churchill, as they believed that there were agreements regarding post-war sharing of nuclear technology, and led to Britain developing its own nuclear weapons. Britain did not begin planning the development of their own nuclear weapon until January 1947. Because of Britain’s small size, they decided to test their bomb on the Monte Bello Islands, off the coast of Australia. Following this successful test, under the leadership of Churchill, Britain decided to develop and test a hydrogen bomb. The first successful hydrogen bomb test occurred on November 8, 1957, which had a yield of 1.8 megatons. An amendment to the Atomic Energy Act in 1958 allowed nuclear cooperation once again, and British-U.S. nuclear programs resumed. During the Cold War, British nuclear deterrence came from submarines and nuclear-armed aircraft. The Resolution class ballistic missile submarines armed with the American-built Polaris missile provided the sea deterrent, while aircraft such as the Avro Vulcan, SEPECAT Jaguar, Panavia Tornado and several other Royal Air Force strike aircraft carrying WE.177 gravity bomb provided the air deterrent.

France became the fourth nation to possess nuclear weapons on February 13, 1960, when the atomic bomb "Gerboise Bleue" was detonated in Algeria, then still a French colony [Formally a part of the Metropolitan France.] France began making plans for a nuclear-weapons program shortly after the Second World War, but the program did not actually begin until the late 1950s. Eight years later, France conducted its first thermonuclear test above Fangatuafa Atoll. It had a yield of 2.6 megatons. This bomb significantly contaminated the atoll with radiation for six years, making it off-limits to humans. During the Cold War, the French nuclear deterrent was centered around the Force de frappe, a nuclear triad consisting of Dassault Mirage IV bombers carrying such nuclear weapons as the AN-22 gravity bomb and the ASMP stand-off attack missile, Pluton and Hades ballistic missiles, and the Redoutable class submarine armed with strategic nuclear missiles. 

The People's Republic of China became the fifth nuclear power on October 16, 1964 when it detonated a 25 kiloton uranium-235 bomb in a test codenamed 596 at Lop Nur. In the late 1950s, China began developing nuclear weapons with substantial Soviet assistance in exchange for uranium ore. However, the Sino-Soviet ideological split in the late 1950s developed problems between China and the Soviet Union. This caused the Soviets to cease helping China develop nuclear weapons. However, China continued developing nuclear weapons without Soviet support and made remarkable progress in the 1960s. Due to Soviet/Chinese tensions, the Chinese might have used nuclear weapons against either the United States or the Soviet Union in the event of a nuclear war between the United States and the Soviet Union. During the Cold War, the Chinese nuclear deterrent consisted of gravity bombs carried aboard H-6 bomber aircraft, missile systems such as the DF-2, DF-3, and DF-4, and in the later stages of the Cold War, the Type 092 ballistic missile submarine. On June 14, 1967, China detonated its first hydrogen bomb.

Cuban Missile Crisis

More than 100 US-built missiles having the capability to strike Moscow with nuclear warheads were deployed in Italy and Turkey in 1961

 

On January 1, 1959, the Cuban government fell to communist revolutionaries, propelling Fidel Castro into power. The Soviet Union supported and praised Castro and his resistance, and the new government was recognized by the Soviet government on January 10. When the United States began boycotting Cuban sugar, the Soviet Union began purchasing large quantities to support the Cuban economy in return for fuel and eventually placing nuclear ballistic missiles on Cuban soil. These missiles would be capable of reaching the United States very quickly. On October 14, 1962, an American spy plane discovered these nuclear missile sites under construction in Cuba.

President Kennedy immediately called a series of meetings for a small group of senior officials to debate the crisis. The group was split between a militaristic solution and a diplomatic one. President Kennedy ordered a naval blockade around Cuba and all military forces to DEFCON 3. As tensions increased, Kennedy eventually ordered U.S. military forces to DEFCON 2. This was the closest the world has been to a nuclear war. While the U.S. military had been ordered to DEFCON 2, reaching a nuclear war was still a ways off. The theory of mutually assured destruction seems to put the entry into nuclear war an unlikely possibility. While the public perceived the Cuban Missile Crisis as a time of near mass destruction, the leaders of the United States and the Soviet Union were working behind the sight of the public eye in order to come to a peaceful conclusion. Premier Khrushchev writes to President Kennedy in a telegram on October 26, 1962 saying that, "Consequently, if there is no intention to tighten that knot and thereby to doom the world to the catastrophe of thermonuclear war, then let us not only relax the forces pulling on the ends of the rope, let us take measures to untie that knot." It is apparently clear that both men wanted to avoid nuclear war due to mutually assured destruction which leads to the question of just how close the world was from experiencing a nuclear war. 

Eventually, on October 28, through much discussion between U.S and Soviet officials, Khrushchev announced that the Soviet Union would withdraw all missiles from Cuba. Shortly after, the U.S. withdrew all their nuclear missiles from Turkey in secret, which had threatened the Soviets. The U.S.'s withdrawal of their Jupiter Missiles from Turkey was kept private for decades after, causing the negotiations between the two nations to appear to the world as a major U.S. victory. This ultimately led to the downfall of Premier Khrushchev.

Détente

U.S. President Richard Nixon with Soviet General Secretary Leonid Brezhnev, 1973

 

By the 1970s, with the cold war entering its 30th year with no direct conflict between the superpowers, the United States and the Soviet Union entered a period of reduced conflict, in which the two powers engaged in trade and exchanges with each other. This period was known as détente. This period included negotiation of a number of arms control agreements, building with the Nuclear Test Ban Treaty in the 1950s, but with significant new treaties negotiated in the 1970s. These treaties were only partially successful. Although both states continued to hold massive numbers of nuclear weapons and research more effective technology, the growth in number of warheads was first limited, and later, with the START I, reversed.

Treaties

In 1958, both the U.S. and Soviet Union agreed to informally suspend nuclear testing. However, this agreement was ended when the Soviets resumed testing in 1961, followed by a series of nuclear tests conducted by the U.S. These events led to much political fallout, as well as the Cuban Missile Crisis in 1962. Something had to be done to ease the great tensions between these two countries, so on October 10, 1963, the Limited Test Ban Treaty (LTBT) was signed. This was an agreement between the U.S., the Soviet Union, and the U.K., which significantly restricted nuclear testing. All atmospheric, underwater, and outer space nuclear testing were agreed to be halted, but testing was still allowed underground. An additional 113 countries have signed this treaty since 1963.

SALT I and SALT II limited the size of the states' arsenals. Bans on nuclear testing, anti-ballistic missile systems, and weapons in space all attempted to limit the expansion of the arms race through the Partial Test Ban Treaty. 

In November, 1969, Strategic Arms Limitation Talks (SALT) begun. This was primarily due to the economic impact that nuclear testing and production had on both U.S. and Soviet economies. The SALT I Treaty, which was signed in May, 1972, produced an agreement on two significant documents. These were the Anti-Ballistic Missile Treaty (ABM Treaty) and the Interim Agreement on the Limitation of Strategic Offensive Arms. The ABM treaty limited each country to two ABM sites, while the Interim Agreement froze each country's number of intercontinental ballistic missiles (ICBMs) and submarine-launched ballistic missiles (SLBMs) at current levels for five years. This treaty significantly reduced nuclear-related costs as well as the risk of nuclear war. However, SALT I failed to address how many nuclear warheads could be placed on one missile. A new technology, known as multiple-independently targetable re-entry vehicle (MIRV), allowed single missiles to hold and launch multiple nuclear missiles at targets while in mid-air. Over the next 10 years, the Soviet Union and U.S added 12,000 nuclear warheads to their already built arsenals.

Throughout the 1970s, both the Soviet Union and United States replaced old missiles and warheads with newer, more powerful and effective ones. This continued to worsen Soviet-U.S relations. On June 18, 1979, the SALT II treaty was signed in Vienna. This treaty limited both sides' nuclear arsenals and technology. However, in light of the Soviet Union's invasion of Afghanistan in December 1979, the United States Senate never ratified the SALT II treaty. This ended the treaty negotiations as well as the era of détente. The United States once again significantly increased military and nuclear spending, while the Soviets were unable to respond and continued to pursue détente. 

In 1991, the START (Strategic Arms Reduction Treaty) was negotiated between the U. S. and the Soviet Union, to reduce the number and limit the capabilities of limitation of strategic offensive arms. This was eventually succeeded by the START II, START III, and New START treaties.

Reagan and the Strategic Defense Initiative

Protest in Bonn, West Germany against the nuclear arms race between the U.S./NATO and the Soviet Union, 1981

 

Despite détente, both sides continued to develop and introduce more accurate weapons and weapons with more warheads ("MIRVs"). The presidency of Ronald Reagan proposed a missile defense programmed tagged the Strategic Defense Initiative, a space based anti-ballistic missile system derided as "Star Wars" by its critics; simultaneously, missile defense was also being researched in the Soviet Union. However, the SDI would require technology that had not yet been developed, or even researched. This system proposed both space- and earth-based laser battle stations. It would also need sensors on the ground, in the air, and in space with radar, optical, and infrared technology to detect incoming missiles. Simultaneously, however, Reagan initiated negotiations with Mikhail Gorbachev ultimately resulting in the Strategic Arms Reduction Treaty on reducing nuclear stockpiles.

Due to high costs and complex technology for its time, the scope of the SDI project was reduced from defense against a massive attack to a system for defending against limited attacks, transitioning into the Ballistic Missile Defense Organization.

The end of the Cold War

Soviet General Secretary Gorbachev and U.S. President Reagan signing the INF Treaty, 1987

 

During the mid-1980s, the U.S-Soviet relations significantly improved, Mikhail Gorbachev assumed control of the Soviet Union after the deaths of several former Soviet leaders, and announced a new era of perestroika and glasnost, meaning restructuring and openness respectively. Gorbachev proposed a 50% reduction of nuclear weapons for both the U.S and Soviet Union at the meeting in Reykjavik, Iceland in October 1986. However, the proposal was refused due to disagreements over Reagan's SDI. Instead, the Intermediate Nuclear Forces (INF) Treaty was signed on December 8, 1987 in Washington, which eliminated an entire class of nuclear weapons.

Due to the dramatic economic and social changes occurring within the Soviet Union, many of its constituent republics began to declare their independence. With the wave of revolutions sweeping across Eastern-Europe, the Soviet Union was unable to impose its will on its satellite states and so its sphere of influence slowly diminished. By December 16, 1991, all of the republics had declared independence from the Union. The Soviet leader, Mikhail Gorbachev resigned as the country's President on December 25 and the Soviet Union was declared non-existent the following day.

Post–Cold War

Dmitry Medvedev with Barack Obama after signing the New START treaty in Prague, 2010

 

With the end of the Cold War, the United States and Russia cut down on nuclear weapons spending. Fewer new systems were developed and both arsenals were reduced; although both countries maintain significant stocks of nuclear missiles. In the United States, stockpile stewardship programs have taken over the role of maintaining the aging arsenal.

After the Cold War ended, large inventories of nuclear weapons and facilities remained. Some are being recycled, dismantled, or recovered as valuable substances. As a result, a large amount of resources and money which was once spent on developing nuclear weapons in Soviet Union was then spent on repairing the environmental damage produced by the nuclear arms race, and almost all former production sites are now major cleanup sites. In the United States, the plutonium production facility at Hanford, Washington and the plutonium pit fabrication facility at Rocky Flats, Colorado are among the most polluted sites.

Military policies and strategies have been modified to reflect the increasing intervals without major confrontation. In 1995, United States policy and strategy regarding nuclear proliferation was outlined in the document "Essentials of Post–Cold War Deterrence", produced by the Policy Subcommittee of the Strategic Advisory Group (SAG) of the United States Strategic Command.

On April 8, 2010, former U.S. President Barack Obama and Russian President Dmitry Medvedev signed the New START Treaty, which called for a fifty percent reduction of strategic nuclear missile launchers and a curtailment of deployed nuclear warheads.^[38] The U.S. Senate ratified the treaty in December 2010 by a three-quarter majority.

Large stockpile with global range (dark blue), smaller stockpile with global range (medium blue), small stockpile with regional range (light blue).

 

On 13 December 2001, George W. Bush gave Russia notice of the United States' withdrawal from the Anti-Ballistic Missile Treaty. This led to the eventual creation of the American Missile Defense Agency. Russian President Vladimir Putin responded to the withdrawal by ordering a build-up of Russia's nuclear capabilities, designed to counterbalance U.S. capabilities.

On December 22, 2016, U.S. President Donald Trump proclaimed in a tweet that "the United States must greatly strengthen and expand its nuclear capability until such time as the world comes to its senses regarding nukes," effectively challenging the world to re-engage in a race for nuclear dominance. The next day, Trump reiterated his position to Morning Joe host Mika Brzezinski of MSNBC, stating: "Let it be an arms race. We will outmatch them at every pass and outlast them all."

In October 2018, the former Soviet leader Mikhail Gorbachev commented that U.S. withdrawal from the INF nuclear treaty is "not the work of a great mind" and that "a new arms race has been announced".

In early 2019, more than 90% of world's 13,865 nuclear weapons were owned by Russia and the United States.

India and Pakistan

In South Asia, India and Pakistan have also engaged in a technological nuclear arms race since the 1970s. The nuclear competition started in 1974 with India detonating the device, codename Smiling Buddha, at the Pokhran region of the Rajasthan state. The Indian government termed this test as a "peaceful nuclear explosion", but according to independent sources, it was actually part of an accelerated covert nuclear program of India.

This test generated great concern and doubts in Pakistan, with fear it would be at the mercy of its long–time arch rival. Pakistan had its own covert atomic bomb projects in 1972 which extended over many years since the first Indian weapon was detonated. After the 1974 test, Pakistan's atomic bomb program picked up a great speed and accelerated its atomic project to successfully build its own atomic weapons program. In the last few decades of the 20th century, India and Pakistan began to develop nuclear-capable rockets and nuclear military technologies. Finally, in 1998 India, under Atal Bihari Vajpayee government, test detonated 5 more nuclear weapons. Domestic pressure within Pakistan began to build steam and Prime Minister Nawaz Sharif ordered the test, detonated 6 nuclear war weapons (Chagai-I and Chagai-II) in a tit-for-tat fashion and to act as a deterrent.

Defense against nuclear attacks

From the beginning of the Cold War, The United States, Russia, and other nations have all attempted to develop Anti-ballistic missiles. The United States developed the LIM-49 Nike Zeus in the 1950s in order to destroy incoming ICBMs.

Russia has, too, developed ABM missiles in the form of the A-35 anti-ballistic missile system and the later A-135 anti-ballistic missile system. Chinese state media has also announced to have tested anti-ballistic missiles, though specific information is not public.

India has successfully developed its Ballistic Missile Shield in the programme Indian Ballistic Missile Defence Programme with the test fire of Prithvi Air Defense (PAD) and it has also developed a cruise missile defense Akash Air Defense (AAD) to intercept low flying missiles making India one of the five countries with Missile Shield.

World War III

From Wikipedia, the free encyclopedia

Nuclear warfare is a common theme of World War III scenarios. Such a conflict has been hypothesised to result in human extinction.

 

World War III (WWIII or WW3) and the Third World War are names given to a hypothetical third worldwide large-scale military conflict subsequent to World War I and World War II. The term has been in use since at least as early as 1941. Some have applied it loosely to refer to limited or smaller conflicts such as the Cold War or the War on Terror, while others assumed that such a conflict would surpass prior world wars both in its scope and in its destructive impact.

Due to the development and use of nuclear weapons near the end of World War II and their subsequent acquisition and deployment by many countries, the potential risk of a nuclear devastation of Earth's civilization and life is a common theme in speculations about a Third World War. Another major concern is that biological warfare could cause a very large number of casualties, either intentionally or inadvertently by an accidental release of a biological agent, the unexpected mutation of an agent, or its adaptation to other species after use. High-scale apocalyptic events like these, caused by advanced technology used for destruction, could potentially make the Earth's surface uninhabitable. 

Prior to the beginning of the Second World War, the First World War (1914–1918) was believed to have been "the war to end all wars," as it was popularly believed that never again could there possibly be a global conflict of such magnitude. During the interwar period, WWI was typically referred to simply as "The Great War." The outbreak of World War II in 1939 disproved the hope that mankind might have already "outgrown" the need for such widespread global wars.

With the advent of the Cold War in 1945 and with the spread of nuclear weapons technology to the Soviet Union, the possibility of a third global conflict became more plausible. During the Cold War years, the possibility of a Third World War was anticipated and planned for by military and civil authorities in many countries. Scenarios ranged from conventional warfare to limited or total nuclear warfare. At the height of the Cold War, a scenario referred to as Mutually Assured Destruction ("MAD") had been calculated which determined that an all-out nuclear confrontation would most certainly destroy all or nearly all human life on the planet. The potential absolute destruction of the human race may have contributed to the ability of both American and Soviet leaders to avoid such a scenario.

Coinage

Time magazine

Time magazine was an early adopter if not originator of the term "World War III". Perhaps the first usage appears in its 3 November 1941, issue (preceding the Japanese attack on Pearl Harbor on 7 December 1941) under its "National Affairs" section and entitled "World War III?" about Nazi refugee Dr. Hermann Rauschning, who had just arrived in the United States. In its 22 March 1943, issue under its "Foreign News" section, Time reused the same title "World War III?" with regard to statements by then-U.S. Vice President Henry A. Wallace: "We shall decide some time in 1943 or 1944 ... whether to plant the seeds of World War III." Time continued to entitle with or mention in stories the term "World War III" for the rest of the decade (and onwards): 1944, 1945, 1946 ("bacterial warfare"), 1947, and 1948. (Time persists in using this term, e.g., this 2015 book review, entitled "This Is What World War III Will Look Like.")

Military plans

Military planners have been war gaming various scenarios, preparing for the worst, since the early days of the Cold War. Some of those plans are now out of date and have been partially or fully declassified.

Operation Unthinkable

British Prime Minister Winston Churchill was concerned that, with the enormous size of Soviet forces deployed in Europe at the end of WWII and the unreliability of the Soviet leader Joseph Stalin, there was a serious threat to Western Europe. In April–May 1945, British Armed Forces developed Operation Unthinkable, thought to be the first scenario of the Third World War. Its primary goal was "to impose upon Russia the will of the United States and the British Empire". The plan was rejected by the British Chiefs of Staff Committee as militarily unfeasible.

Operation Dropshot

"Operation Dropshot" was the 1950s United States contingency plan for a possible nuclear and conventional war with the Soviet Union in the Western European and Asian theaters.

At the time the US nuclear arsenal was limited in size, based mostly in the United States, and depended on bombers for delivery. "Dropshot" included mission profiles that would have used 300 nuclear bombs and 29,000 high-explosive bombs on 200 targets in 100 cities and towns to wipe out 85% of the Soviet Union's industrial potential at a single stroke. Between 75 and 100 of the 300 nuclear weapons were targeted to destroy Soviet combat aircraft on the ground.

The scenario was devised prior to the development of intercontinental ballistic missiles. It was also devised before U.S. President John F. Kennedy and his Secretary of Defense Robert McNamara changed the US Nuclear War plan from the 'city killing' countervalue strike plan to a "counterforce" plan (targeted more at military forces). Nuclear weapons at this time were not accurate enough to hit a naval base without destroying the city adjacent to it, so the aim in using them was to destroy the enemy industrial capacity in an effort to cripple their war economy.

Exercises Grand Slam, Longstep, and Mainbrace

In January 1950, the North Atlantic Council approved NATO's military strategy of containment. NATO military planning took on a renewed urgency following the outbreak of the Korean War in the early 1950s, prompting NATO to establish a "force under a centralised command, adequate to deter aggression and to ensure the defence of Western Europe". Allied Command Europe was established under General of the Army Dwight D. Eisenhower, US Army, on 2 April 1951. The Western Union Defence Organization had previously carried out Exercise Verity, a 1949 multilateral exercise involving naval air strikes and submarine attacks.

Exercise Mainbrace brought together 200 ships and over 50,000 personnel to practice the defence of Denmark and Norway from Russian attack in 1952. It was the first major NATO exercise. The exercise was jointly commanded by Supreme Allied Commander Atlantic Admiral Lynde D. McCormick, USN, and Supreme Allied Commander Europe General Matthew B. Ridgeway, US Army, during the autumn of 1952.

The US, UK, Canada, France, Denmark, Norway, Portugal, Netherlands, and Belgium all participated. 

Exercises Grand Slam and Longstep were naval exercises held in the Mediterranean Sea during 1952 to practice dislodging an enemy occupying force and amphibious assault. It involved over 170 warships and 700 aircraft under the overall command of Admiral Carney. The overall exercise commander, Admiral Carney summarized the accomplishments of Exercise Grand Slam by stating: "We have demonstrated that the senior commanders of all four powers can successfully take charge of a mixed task force and handle it effectively as a working unit."

The USSR called the exercises "war-like acts" by NATO, with particular reference to the participation of Norway and Denmark, and prepared for its own military maneuvers in the Soviet Zone.

Operation Strikeback

This was a major NATO naval exercise held in 1957, simulating a response to an all-out Soviet attack on NATO. The exercise involved over 200 warships, 650 aircraft, and 75,000 personnel from the United States Navy, the United Kingdom's Royal Navy, the Royal Canadian Navy, the French Navy, the Royal Netherlands Navy, and the Royal Norwegian Navy. As the largest peacetime naval operation up to that time, Operation Strikeback was characterized by military analyst Hanson W. Baldwin of The New York Times as "constituting the strongest striking fleet assembled since World War II".

Exercise Reforger

If activated, Operation Reforger would have largely consisted of convoys like this one from Operation Earnest Will in 1987, although much larger. While troops could easily fly across the Atlantic, the heavy equipment and armor reinforcements would have to come by sea.

 

Exercise Reforger (from return of forces to Germany) was an annual exercise conducted, during the Cold War, by NATO. The exercise was intended to ensure that NATO had the ability to quickly deploy forces to West Germany in the event of a conflict with the Warsaw Pact. The Warsaw Pact outnumbered NATO throughout the Cold War in conventional forces, especially armor. Therefore, in the event of a Soviet invasion, in order not to resort to tactical nuclear strikes, NATO forces holding the line against a Warsaw Pact armored spearhead would have to be quickly resupplied and replaced. Most of this support would have come across the Atlantic from the US and Canada.

Reforger was not merely a show of force—in the event of a conflict, it would be the actual plan to strengthen the NATO presence in Europe. In that instance, it would have been referred to as Operation Reforger. Important components in Reforger included the Military Airlift Command, the Military Sealift Command, and the Civil Reserve Air Fleet.

Seven Days to the River Rhine

A Warsaw Pact invasion would have come via three main paths through West Germany.

 

Seven Days to the River Rhine was a top-secret military simulation exercise developed in 1979 by the Warsaw Pact. It started with the assumption that NATO would launch a nuclear attack on the Vistula river valley in a first-strike scenario, which would result in as many as two million Polish civilian casualties. In response, a Soviet counter-strike would be carried out against West Germany, Belgium, the Netherlands and Denmark, with Warsaw Pact forces invading West Germany and aiming to stop at the River Rhine by the seventh day. Other USSR plans stopped only upon reaching the French border on day nine. Individual Warsaw Pact states were only assigned their own subpart of the strategic picture; in this case, the Polish forces were only expected to go as far as Germany. The Seven Days to the Rhine plan envisioned that Poland and Germany would be largely destroyed by nuclear exchanges, and that large numbers of troops would die of radiation sickness. It was estimated that NATO would fire nuclear weapons behind the advancing Soviet lines to cut off their supply lines and thus blunt their advance. While this plan assumed that NATO would use nuclear weapons to push back any Warsaw Pact invasion, it did not include nuclear strikes on France or the United Kingdom. Newspapers speculated when this plan was declassified, that France and the UK were not to be hit in an effort to get them to withhold use of their own nuclear weapons.

Exercise Able Archer

President Ronald Reagan and Soviet double agent Oleg Gordievsky, who later told the west how close the Able Archer 83 exercise had brought the Soviets to ordering a First Strike.

 

Exercise Able Archer was an annual exercise by the United States military in Europe that practised command and control procedures, with emphasis on the transition from solely conventional operations to chemical, nuclear, and conventional operations during a time of war. 

"Able Archer 83" was a five-day North Atlantic Treaty Organization (NATO) command post exercise starting on 7 November 1983, that spanned Western Europe, centered on the Supreme Headquarters Allied Powers Europe (SHAPE) Headquarters in Casteau, north of the city of Mons. Able Archer exercises simulated a period of conflict escalation, culminating in a coordinated nuclear attack.

The realistic nature of the 1983 exercise, coupled with deteriorating relations between the United States and the Soviet Union and the anticipated arrival of strategic Pershing II nuclear missiles in Europe, led some members of the Soviet Politburo and military to believe that Able Archer 83 was a ruse of war, obscuring preparations for a genuine nuclear first strike. In response, the Soviets readied their nuclear forces and placed air units in East Germany and Poland on alert. This "1983 war scare" is considered by many historians to be the closest the world has come to nuclear war since the Cuban Missile Crisis of 1962. The threat of nuclear war ended with the conclusion of the exercise on 11 November, however.

Strategic Defense Initiative

The Strategic Defense Initiative (SDI) was proposed by U.S. President Ronald Reagan on 23 March 1983. In the latter part of his presidency, numerous factors (which included watching the 1983 movie The Day After and hearing through a Soviet defector that Able Archer 83 almost triggered a Russian first strike) had turned Ronald Reagan against the concept of winnable nuclear war, and he began to see nuclear weapons as more of a "wild card" than a strategic deterrent. Although he later believed in disarmament treaties slowly blunting the danger of nuclear weaponry by reducing their number and alert status, he also believed a technological solution might allow incoming ICBMs to be shot down, thus making the US invulnerable to a first strike. However, the USSR saw the SDI concept as a major threat, since a unilateral deployment of the system would allow the US to launch a massive first strike on the Soviet Union without any fear of retaliation. 

The SDI concept was to use ground-based and space-based systems to protect the United States from attack by strategic nuclear ballistic missiles. The initiative focused on strategic defense rather than the prior strategic offense doctrine of Mutual Assured Destruction (MAD). The Strategic Defense Initiative Organization (SDIO) was set up in 1984 within the United States Department of Defense to oversee the Strategic Defense Initiative.

NATO nuclear sharing

NATO operational plans for a Third World War have involved NATO allies who do not have their own nuclear weapons, using nuclear weapons supplied by the United States as part of a general NATO war plan, under the direction of NATO's Supreme Allied Commander. 

Protest in Amsterdam against the nuclear arms race between the U.S./NATO and the Soviet Union, 1981

 

Of the three nuclear powers in NATO (France, the United Kingdom, and the United States) only the United States has provided weapons for nuclear sharing. As of November 2009, Belgium, Germany, Italy, the Netherlands and Turkey are still hosting US nuclear weapons as part of NATO's nuclear sharing policy. Canada hosted weapons until 1984, and Greece until 2001. The United Kingdom also received US tactical nuclear weapons such as nuclear artillery and Lance missiles until 1992, despite the UK being a nuclear weapons state in its own right; these were mainly deployed in Germany.

In peacetime, the nuclear weapons stored in non-nuclear countries are guarded by US airmen though previously some artillery and missile systems were guarded by US Army soldiers; the codes required for detonating them are under American control. In case of war, the weapons are to be mounted on the participating countries' warplanes. The weapons are under custody and control of USAF Munitions Support Squadrons co-located on NATO main operating bases who work together with the host nation forces.

As of 2005, 180 tactical B61 nuclear bombs of the 480 US nuclear weapons believed to be deployed in Europe fall under the nuclear sharing arrangement. The weapons are stored within a vault in hardened aircraft shelters, using the USAF WS3 Weapon Storage and Security System. The delivery warplanes used are F-16s and Panavia Tornados.

Historical close calls

With the initiation of the Cold War arms race in the 1950s, an apocalyptic war between the United States and the Soviet Union became a real possibility. During the Cold War era (1947–1991), a number of military events have been described as having come quite close to potentially triggering World War III.

Korean War: 25 June 1950 – 27 July 1953

The Korean War was a war between two coalitions fighting for control over the Korean Peninsula: a communist coalition including North Korea, China and the USSR, and a capitalist coalition including South Korea, the United States, and the UN. Many then believed that the conflict was likely to soon escalate into a full-scale war between the three countries, the US, the USSR, and China. CBS war correspondent Bill Downs wrote in 1951 that, "To my mind, the answer is: Yes, Korea is the beginning of World War III. The brilliant landings at Inchon and the cooperative efforts of the American armed forces with the United Nations Allies have won us a victory in Korea. But this is only the first battle in a major international struggle which now is engulfing the Far East and the entire world." Downs afterwards repeated this belief on ABC Evening News while reporting on the USS Pueblo incident in 1968.

Cuban Missile Crisis: 15–28 October 1962

A US Navy HSS-1 Seabat helicopter hovers over Soviet submarine B-59, forced to the surface by US Naval forces in the Caribbean near Cuba. B-59 had a nuclear torpedo on board, and three officer keys were required to use it. Only one dissent prevented the submarine from attacking the US fleet nearby, a spark that could have led to a Third World War ( 28–29 October 1962).

 

The Cuban Missile Crisis: a confrontation on the stationing of Soviet nuclear missiles in Cuba, in response to the failed Bay of Pigs Invasion, is considered as having been the closest to a nuclear exchange, which could have precipitated a Third World War. The crisis peaked on 27 October, with three separate major incidents occurring on the same day, all of these incidents having been initiated by the US military.

• The "Arkhipov save" incident occurred when a Soviet submarine nearly launched a nuclear-tipped torpedo in response to having been targeted by American naval depth charges in international waters, with the Soviet nuclear launch response only having being prevented by Soviet naval officer Vasily Arkhipov.
• The shooting down of a U-2 while violating Cuban airspace.
• The near interception of another U-2 that had somehow managed to stray into Soviet airspace over Siberia, which airspace violation nearly caused the Soviets to believe that this might be the vanguard of a US aerial bombardment.

Despite what many believe to be the closest the world has come to a nuclear conflict, throughout the entire standoff, the Doomsday Clock, which is run by the Bulletin of the Atomic Scientists to estimate how close the end of the world, or doomsday, is, with midnight being the apocalypse, stayed at a relatively stable seven minutes to midnight. This has been explained as being due to the brevity of the crisis, since the clock monitored more long term factors such as leadership of countries, conflicts, wars, and political upheavals, as well as societies reactions to said factors. 

The Bulletin of the Atomic Scientists now credits the political developments resulting from the Cuban Missile Crisis with having actually enhanced global stability. The Bulletin posits that future crises and occasions that might otherwise escalate, were rendered as more stable due to two major factors:

1. A Washington to Moscow direct telephone line, resulted from the communication trouble between the White House and the Kremlin during the crisis, giving the leaders of the two largest nuclear powers the ability to contact each other in real time, rather than sending written messages that needed to be translated and wired, which had dragged out conversations in which seconds could have potentially prevented a nuclear exchange.
2. The second factor was caused in part due to the worldwide reaction to how close the US and USSR had come to the brink of World War III during the standoff. As the public began to more closely monitor topics involving nuclear weapons, and therefore to rally support for the cause of non-proliferation, the 1963 test ban treaty was signed. To date this treaty has been signed by 126 total nations, with the most notable exceptions being France and China. Both of these countries were still in the relative beginning stages of their nuclear programs at the time of the original treaty signing, and both sought nuclear capabilities independent of their allies.

-This Test Ban Treaty prevented the testing of nuclear ordnance that detonated in the atmosphere, limiting testing to below ground and under water, decreasing fallout and effects on the environment, and subsequently caused the Doomsday Clock to decrease by five minutes, to arrive at a total of twelve minutes to midnight. Up until this point, over 1000 nuclear bombs had been detonated, and concerns over both long and short term affects to the planet became increasingly more worrisome to scientists.

Yom Kippur War super-power tensions: 6–25 October 1973

The Yom Kippur War, also known as the Ramadan War, or October War, began with Arab victories. Israel successfully counterattacked. Tensions grew between the US (which supported Israel) and the Soviet Union (which sided with the Arab states). American and Soviet naval forces came close to firing upon each other. Admiral Murphy of the US reckoned the chances of the Soviet squadron attempting a first strike against his fleet at 40 percent. The Pentagon moved Defcon status from 4 to 3. The superpowers had been pushed to the brink of war, but tensions eased with the ceasefire brought in under UNSC 339.

NORAD computer error of 1979: 9 November 1979

The United States made emergency retaliation preparations after NORAD saw on-screen indications that a full-scale Soviet attack had been launched. No attempt was made to use the "red telephone" hotline to clarify the situation with the USSR and it was not until early-warning radar systems confirmed no such launch had taken place that NORAD realized that a computer system test had caused the display errors. A senator inside the NORAD facility at the time described an atmosphere of absolute panic. A GAO investigation led to the construction of an off-site test facility to prevent similar mistakes.

"Petrov save" incident: 26 September 1983

A false alarm occurred on the Soviet nuclear early warning system, showing the launch of American Minuteman ICBMs from bases in the United States. A retaliatory attack was prevented by Stanislav Petrov, an officer of the Soviet Air Defence Forces, who realised the system had simply malfunctioned (which was borne out by later investigations).

Able Archer escalations: 2–11 November 1983

During Able Archer 83, a ten-day NATO exercise simulating a period of conflict escalation that culminated in a DEFCON 1 nuclear strike, some members of the Soviet Politburo and armed forces treated the events as a ruse of war concealing a genuine first strike. In response, the military prepared for a coordinated counter-attack by readying nuclear forces and placing air units stationed in the Warsaw Pact states of East Germany and Poland under high alert. However, the state of Soviet preparation for retaliation ceased upon completion of the Able Archer exercises.

Norwegian rocket incident: 25 January 1995

The Norwegian rocket incident is the only World War III close call to occur outside the Cold War. This incident occurred when Russia's Olenegorsk early warning station accidentally mistook the radar signature from a Black Brant XII research rocket (being jointly launched by Norwegian and US scientists from Andøya Rocket Range), as appearing to be the radar signature of the launch of a Trident SLBM missile. In response, Russian President Boris Yeltsin was summoned and the Cheget nuclear briefcase was activated for the first and only time. However, the high command was soon able to determine that the rocket was not entering Russian airspace, and promptly aborted plans for combat readiness and retaliation. It was retrospectively determined that, while the rocket scientists had informed thirty states including Russia about the test launch, the information had not reached Russian radar technicians.

Incident at Pristina airport: 12 June 1999

On 12 June 1999, the day following the end of the Kosovo War, some 250 of Russian peacekeeping troops occupied the Pristina International Airport ahead of the arrival of NATO troops and were to secure the arrival of reinforcements over the air. American NATO Supreme Allied Commander Europe General Wesley Clark ordered the use of force against the Russians. Mike Jackson, British Army general who contacted the Russians during the incident, refused to enforce Clark's orders, famously telling him "I'm not going to start the Third World War for you." Captain James Blunt, the lead officer at the front of the Nato column in the direct armed stand-off against the Russians, received the "Destroy!" orders from Clark over the radio, but he followed Jackson's orders to encircle the airfield instead and later told in an interview that even without Jackson's intervention he would have refused to follow Clark's order. 

Extended usage of the term

Large nuclear weapons stockpile with global range (dark blue), smaller stockpile with global range (medium blue)

Cold War

As Soviet-American relations grew more tense in the post-World War II period, the fear that it could escalate into World War III was ever-present. A Gallup poll in December 1950 found that more than half of Americans considered World War III to have already started.

In 2004, commentator Norman Podhoretz proposed that the Cold War, lasting from the surrender of Japan and Germany until the fall of the Berlin Wall, might rightly be called World War III. By Podhoretz's reckoning, "World War IV" would be the global campaign against Islamofascism.

Still the majority of historians would seem to hold that World War III would necessarily have to be a worldwide "war in which large forces from many countries fought" and a war that "involves most of the principal nations of the world." In his book Secret Weapons of the Cold War, Bill Yenne explains that the military standoff that occurred between the two 'Superpowers', namely the United States and the Soviet Union, from the 1940s through to 1991, was only the Cold War, which ultimately helped to enable mankind to avert the possibility of an all out nuclear confrontation, and that it certainly was not World War III.

War on Terror

September 11 attacks

 

The "War on Terror" that began with the September 11 attacks has been claimed by some to be World War III or sometimes as World War IV. Others have disparaged such claims as "distorting American history." While there is general agreement amongst historians regarding the definitions and extent of the first two world wars, namely due to the unmistakable global scale of aggression and self-destruction of these two wars, a few have claimed that a "World War" might now no longer require such worldwide and large scale aggression and carnage. Still, such claims of a new "lower threshold of aggression," that might now be sufficient to qualify a war as a "World War" have not gained such widespread acceptance and support as the definitions of the first two world wars have received amongst historians.

War on ISIL

On 1 February 2015, Iraqi Foreign Minister Ibrahim al-Jaafari declared that the War on ISIL was effectively "World War III", due to ISIL's declaration of a Worldwide Caliphate, its aims to conquer the world, and its success in spreading the conflict to multiple countries outside of the Levant region. In response to the November 2015 Paris attacks, King of Jordan Abdullah II said "We are facing a Third World War [within Islam]."

In his State of the Union Address on 12 January 2016, U.S. President Barack Obama warned that news reports granting ISIL the supposed ability to foment WW III might be excessive and irresponsible, stating that, "as we focus on destroying ISIL, over-the-top claims that this is World War III just play into their hands. Masses of fighters on the back of pickup trucks and twisted souls plotting in apartments or garages pose an enormous danger to civilians and must be stopped. But they do not threaten our national existence."

Multiple small wars as a "third war"

In multiple recorded interviews under somewhat casual circumstances, comparing the conflagrations of World War I and II to the ongoing lower intensity wars of the 21st century, Pope Francis has said, "The world is at war, because it has lost peace," and "perhaps one can speak of a third war, one fought piecemeal."

Views on the likely outcome and definition

In 1949, after the unleashing of nuclear weaponry at the end of WWII, physicist Albert Einstein suggested that any outcome of a possible WWIII would be so dire as to revert mankind back to the Stone Age. When asked by journalist Alfred Werner, what types of weapons Einstein believed World War III might be fought with, Einstein warned, "I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones".

In his book Destined for War, Graham Allison views the global rivalry between the established power, the US, and the rising power, China, as an example of the Thucydides Trap. Past examples have often led to war, and in this case World War Three is possible but not inevitable.