1972 in the Vietnam War the number of air raids against North Vietnam during all of 1971. Prime Minister Lon Nol declared President of Cambodia. Unlike the former Cambodian leader, Norodom Sihanouk, Lon Nol was a U.S. ally. The U.S. 101st Airborne Division left South Vietnam, the last U.S. ground combat division to be withdrawn from South Vietnam. The Khmer Rouge bombarded with artillery Phnom Penh, the capital city of Cambodia, killing more than 100 civilians. This was the heaviest attack on Phnom Penh since the Cambodian Civil War began in 1970. The United States boycotted peace negotiations in Paris with the North Vietnamese, citing
1972 in the Vietnam War to the Operation Linebacker II bombings, 80 percent of North Vietnam's electrical power production capability had been eliminated. Nixon warned North Vietnam that the bombing would resume if the peace talks collapsed again. North Vietnam declared victory and claimed that heavy losses of American aircraft was the motive behind the bombing halt. General Maxwell Taylor, former Ambassador to South Vietnam, said terminating America's commitment to South Vietnam even without a peace agreement should be considered by the President. U.S. military personnel in South Vietnam numbered 24,200. 1972 in the Vietnam War 1972 in the Vietnam War saw foreign involvement in