Croatia republic in south-eastern Europe, in the Balkan Peninsula, bordered on the north by Slovenia and Hungary, on the east and south by Bosnia and Herzegovina, and on the east by Serbia. The area around the Croatian city of Dubrovnik, located at the southernmost tip of the republic's long western coastline on the Adriatic Sea, has a short border with Montenegro. Serbia and Montenegro since 1991 have accomplished themselves as the Federal Republic of Yugoslavia. Formerly a constituent republic of the Socialist Federal Republic of Yugoslavia, Croatia declared its freedom in June, 1991. The nation has an area of about 56,540 sq km. Zagreb is the republic's capital and largest city.