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 The U.S. 101st Airborne Division left South Vietnam, the last U.S. ground combat division to be withdrawn from South Vietnam.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
1965 in the Vietnam War was stationed at the port city of Nha Trang. The Battle of Ia Drang was one of the most consequential battles of the Vietnam War. For the first time, the United States Army and the People's Army of Vietnam (the North Vietnamese Army) met head-on in a major engagement, with the South Vietnamese army and the Viet Cong playing only minor roles. Casualties were heavy on both sides, with some 250 U.S. and at least 1,200 North Vietnamese dead. For General Westmoreland, the battle was a victory for U.S. firepower and mobility in a war of attrition in which the