The Balkan States are a group of countries located in southeastern Europe. Yugoslavia, now known as Serbia and Montenegro, was a former socialist state that existed from 1918 to 2006. BULGARIA is a country located in the eastern part of the Balkan Peninsula. ALBANIA is a small country located on the Adriatic and Ionian Seas. Thrace is a geographical and historical region located in southeastern Europe, now divided between Greece, Turkey, and BULGARIA. Greece is a country located in southern Europe, bordered by the Mediterranean Sea.