Timeline of Albanian history to 1993 cooperation signed with Yugoslavia; Yugoslav advisers and grain begin pouring into Albania. October<br> 26 October: Two British ships destroyed by mines off Albania's coast in the Straits of Corfu, see Corfu Channel Incident, . November<br> Albania breaks diplomatic relations with the United States after the latter withdraws its informal mission. 1947 April May<br> A United Nations commission concludes that Albania, together with Bulgaria and Yugoslavia, supported communist guerrillas in the Greek Civil War; Yugoslav leaders launch verbal offensive against anti-Yugoslav Albanian communists, including Hoxha; pro-Yugoslav faction begins to wield power. July<br> Albania refuses participation in the Marshall Plan of the
Massacre of the Albanian Beys after the Greek War of Independence the Albanian mercenaries, who were employed during the struggles by the Ottomans, pillaged a large number of villages, while the bey families tried to restore and regain their rule. Their efforts included the organization of the assembly of Berat in December 1828, led by Ismail bey Qemali of the Vlora family, grandfather of Ismail Qemali, founder of the modern Albanian state in 1912. In this Convention, the leaders were Qemali, Zylyftar Poda and Shahin bej Delvina. The Ottoman Empire tried to prevent the rise of local beys, which presented a menace to centralized power.