c. Saigon
After more than a year of devastating battles between the two sides, North Vietnam launched a major invasion in March 1975, and Congress refused South Vietnamese appeals for support. American embassy officials in Saigon evacuated just before communist forces reached the capital. The fall of Salgon in April 1975 marked the end of the Vietnam War, with all of Vietnam now firmly under communist control. The fighting in Indochina would continue over the next five years, as the new Khmer Rouge communist regime in Cambodia embarked on a brutal suppression campaign that killed over a million people, followed by a Vietnamese invasion of Cambodia and a Chinese invasion of Vietnam. Though the American intervention had triggered this series of events, and the United States would admit several hundred thousand refugees fleeing Vietnam by boat in the late 1970s, Ford's government no longer wielded power or influence in the region.