Sazan Island
Albania became dependent on Soviet aid and know-how after the break with Yugoslavia in 1948. In February 1949, Albania gained membership in the communist bloc's organization for coordinating economic planning, the Council for Mutual Economic Assistance. Tirana soon entered into trade agreements with Poland, Czechoslovakia, Hungary, Romania, and the Soviet Union. Soviet and central European technical advisers took up residence in Albania, and the Soviet Union also sent Albania military advisers and built a submarine installation on Sazan Island.