The Congo Crisis (French: Crise congolaise) was a period of political upheaval and conflict in the Republic of the Congo (today the Democratic Republic of the Congo)[c]between 1960 and 1965. It began almost immediately after the Congo became independent from Belgium and ended, unofficially, with the entire country under the rule of Joseph-Désiré Mobutu. Constituting a series of civil wars, the Congo Crisis was also a proxy conflict in the Cold War in which the Soviet Union and United States supported opposing factions. Around 100,000 people are believed to have been killed during the crisis.