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
Albanian nationalism (Albania) policies which strengthened expressions of Albanian nationalism especially in Southern Albania. Italian and French authorities closed down Greek schools, expelled Greek clergy and pro-Greek notables while allowing Albanian education with the French sector promoting Albanian self-government through the Korçë republic. Another factor that reinforced nationalistic sentiments among the population was the return of 20-30,000 Orthodox Albanian emigrants mainly to the Korçë region who had attained Albanian nationalist sentiments abroad. The experience of World War One, concerns over being partitioned and loss of power made the Muslim Albanian population support Albanian nationalism and the territorial integrity of Albania. An understanding also