The Republic of Serbia was a constituent state of the Federal Republic of Yugoslavia between 1992 and 2003 and the State Union of Serbia and Montenegro from 2003 to 2006. With Montenegro's secession from the union with Serbia in June 2006, both became sovereign states in their own right for the first time in nearly 88 years.

Serbia and Montenegro, known until 2003 as the Federal Republic of Yugoslavia, FR Yugoslavia (FRY) or simply Yugoslavia, was a country in Southeast Europe located in the Balkans that existed from 1992 to 2006, following the breakup of the Socialist Federal Republic of Yugoslavia. The country bordered Hungary to the north, Romania to the northeast, Bulgaria to the southeast, North Macedonia to the south, Croatia and Bosnia and Herzegovina to the west, and Albania to the southwest. The state was founded on 27 April 1992 as a federation comprising the Republic of Serbia and the Republic of Montenegro. In February 2003, it was transformed from a federal republic to a political union until Montenegro seceded from the union in June 2006, leading to the full independence of both Serbia and Montenegro.