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 The U.S. 101st Airborne Division left South Vietnam, the last U.S. ground combat division to be withdrawn from South Vietnam.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–Lithuanian Peace Treaty Soviet–Lithuanian Peace Treaty The Soviet–Lithuanian Peace Treaty, also known as the Moscow Peace Treaty, was signed between Lithuania and Soviet Russia on July 12, 1920. In exchange for Lithuania's neutrality and permission to freely move its troops in the recognized territory during its war against Poland, Soviet Russia recognized the sovereignty of Lithuania. The treaty was a major milestone in Lithuania's struggle for international recognition. It also recognized Lithuania's eastern borders. Interwar Lithuania officially maintained that its "de jure" borders were those delineated by the treaty despite the fact that a large territory, the Vilnius Region, was in fact controlled