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-speakers of Western Thrace Albanian-speakers of Western Thrace Albanian-speakers form a linguistic minority in Greek Macedonia and Western Thrace along the border with Turkey. They speak the Northern Tosk subbranch of Tosk Albanian and are descendants of the Albanian population of Eastern Thrace who migrated during the Population exchange between Greece and Turkey in the 1920s. They are known in Greece as Arvanites, a name applied to all groups of Albanian origin in Greece, but which primarily refers to the southern dialectological group of "Arbëreshë". The Albanian-speakers of Western Thrace and Macedonia use the common Albanian self-appellation, "Shqiptar". During the Ottoman Empire, Albanian communities