The Cold War began after World War 2 and lasted from 1945 to 1991. It represented the ideological battle between capitalism led by the United States and its NATO allies, and communism led by the Soviet Union and its Warsaw Pact allies. There was an arms race between the two sides including nuclear weapons and the space race. The US and USSR also fought several proxy wars in Korea and Vietnam in an attempt to contain the spread of the other's ideology. Tensions escalated during events like the Berlin Blockade, Cuban Missile Crisis, and Vietnam War, though the two superpowers never engaged in direct military conflict. The Cold War ended in the late 1980s with reforms in the Soviet Union under Gorbachev that led to the