From Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/State_collapse

State collapse, breakdown, or downfall, is the complete failure of a mode of government within a sovereign state. Sometimes this brings about a failed state, as in Somalia and the final decade of Yugoslavia. More often, there is an immediate process of transition to a new administration, and basic services such as tax collection, defence, police, civil service, and courts are maintained throughout, as in South Africa following the end of the apartheid system.

State collapse may coincide with economic collapse. State collapse is not always synonymous with societal collapse, which often is a more prolonged process, as in the fall of the western Roman Empire.

Not all attempts at regime change succeed in bringing about state collapse. The 16th-century Babington plot to assassinate Queen Elizabeth I of England, the 19th-century Decembrist revolt in Russia, and the 20th-century Bay of Pigs invasion of Cuba failed.

History of the concept