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 The U.S. 101st Airborne Division left South Vietnam, the last U.S. ground combat division to be withdrawn from South Vietnam.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
Ottoman–Venetian peace treaty (1419) Ottoman–Venetian peace treaty (1419) The Ottoman–Venetian peace treaty of 1419 was signed between the Ottoman Empire and Republic of Venice, ending a short conflict between the two powers, confirming Venetian possessions in the Aegean Sea and the Balkans, and stipulating the rules of maritime trade between them. Following the victory of the Ottoman prince Mehmed I in the civil war of the Ottoman Interregnum in 1413, the Republic of Venice, as the premier maritime and commercial power in the area, endeavoured to renew the treaties it had concluded with Mehmed's predecessors. Its "bailo" in the Byzantine capital, Constantinople, Francesco Foscarini,