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
Cham Albanian collaboration with the Axis Paramythia. In 1948 the Greek National Bureau on War Crimes ordered juridical research on the crimes committed by Italians, Albanians and Germans during the Axis occupation. Two days later, the immediate arrest of the defendants was ordered. Because all the defendants were abroad it is unknown if the Greek Foreign Ministry initiated the needed diplomatic procedure. In the Hostages Trial in Nuremberg (1948) the American judges called the executions in Paramythia "plain murder". Cham Albanian collaboration with the Axis During the Axis occupation of Greece between 1941 and 1944, large parts of the Albanian minority in the Thesprotia prefecture in