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 language philologist Franz Bopp. Albanian was formerly compared by a few Indo-European linguists with Germanic and Balto-Slavic, all of which share a number of isoglosses with Albanian. Other linguists linked the Albanian language with Latin, Greek and Armenian, while placing Germanic and Balto-Slavic in another branch of Indo-European. According to the central hypothesis of a project undertaken by the Austrian Science Fund, old Albanian had a significant influence on the development of many languages in the Balkans. This little-known language is being researched using all available texts before a comparison with other Balkan languages is carried out. The outcome of this