The cold war was a very crazy dangerous war. The Cold War featured periods of relative calm and of international high tension – the Berlin Blockade (1948–1949), the Korean War (1950–1953), the Berlin Crisis of 1961, the Vietnam War (1959–1975), the Cuban Missile Crisis (1962), the Sovite war in Afghanistan (1979–1989), and the Able Archer 83 NATO exercises in November 1983. Both sides sought detente to relieve political tensions and deter direct military attack, which would probably guarantee their mutual assured destruction with nuclear weapons.
In the 1980s, under the Reagan Doctrine, the United States increased diplomatic, military, and economic pressures on the Soviet Union, at a time when the nation was already suffering economic stagnation. In the late 1980s, Soviet President Mikhail Gorbachev introduced the liberalizing reforms of perestroika ("reconstruction", "reorganization", 1987) and glasnost ("openness", ca. 1985). The Cold War ended after the Soviet Union collapsed in 1991, leaving the United States as the dominant military power, and Russia possessing most of the Soviet Union's nuclear arsenal. The Cold War and its events have had a significant impact on the world today, and it is commonly referred to in popular culture.