The Soviet Union invaded Afghanistan following the Saur Revolution in that country, ultimately leading to the deaths of around one million civilians. Mujahideen fighters succeeded in forcing a Soviet military withdrawal in 1989. In response, U.S. President Jimmy Carter announced a U.S.-led boycott of the Moscow 1980 Summer Olympics. In 1984, the Soviet Union responded with its own boycott of the 1984 Summer Olympics in Los Angeles, California. Tensions increased when the U.S. announced they would deploy Pershing II missiles in West Germany, followed by Reagan's announcement of the U.S. Strategic Defense Initiative and were further exacerbated in 1983 when Reagan branded the Soviet Union an "evil empire".