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 The U.S. 101st Airborne Division left South Vietnam, the last U.S. ground combat division to be withdrawn from South Vietnam.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
Soviet Middle Eastern foreign policy during the Cold War fledgling Communist regimes while attacking an Islamic nation. Shuttle diplomacy was instrumental in brokering a Middle Eastern peace. U.S. Secretary of State Henry Kissinger spent considerable time at Middle Eastern peace talks as a neutral party. He explained the reasons behind the need to pull out of Vietnam, which complicated the Middle Eastern talks and the nascent nuclear-nonproliferation-treaty talks. President Richard Nixon used the Sino-Soviet split to begin ending the Cold War by breaking down political and economic barriers between the U.S. and China, further isolated the Soviets. Kissinger spoke about his roles in brokering peace between the Arabs and