premise: The Republic of Macedonia is in the Balkan Peninsula.
hypothesis: The Balkan League was an alliance formed by a series of bilateral treaties concluded in 1912 between the Balkan states of Greece , Bulgaria , Serbia and Montenegro , and directed against the Ottoman Empire , which at the time still controlled much of the Balkan peninsula . Republic of Macedonia . Republika Makedonija ) , is a country in the Balkan peninsula in Southeast Europe .