The Republic of Serbia (Serbo-Croatian: Република Србија / Republika Srbija) 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.
After the League of Communists of Yugoslavia collapsed in 1990, the Socialist Republic of Serbia led by Slobodan Milošević's Socialist Party (formerly the Communists) adopted a new constitution, declaring itself a constituent republic with democratic institutions within Yugoslavia, and the "Socialist" adjective was dropped from the official title. As Yugoslavia broke up, in 1992 Serbia and Montenegro formed a new federative state called the Federal Republic of Yugoslavia, known after 2003 as simply Serbia and Montenegro.