The war in Vietnam and the Watergate crisis shattered confidence in the presidency. International frustrations, including the fall of South Vietnam in 1975, the hostage crisis in Iran from 1979-1981, the Soviet invasion of Afghanistan, the growth of international terrorism, and the acceleration of the arms race raised fears over the country's foreign policy. The energy crisis, unemployment, and inflation, derided as "stagflation," raised fundamental questions over the future of American prosperity.