State of Slovenes, Croats and Serbs became merged with Kingdom of Serbia and Kingdom of Montenegro to form the nation of Yugoslavia in 1918. The formation of Yugoslavia began with the formation of the Yugoslav Committee, a collection of mostly Croats, then Serbs and later Slovenes, whose goal was to form a single south Slavic state. In October 1918 the Croatian Parliament declared the Kingdom of Croatia - Slavonia as an independent state, which, in December that same year, incorporated in State of Slovenes, Croats and Serbs, merged with Kingdom of Serbia and Kingdom of Montenegro and created the Kingdom of Serbs, Croats and Slovenes. The kingdom would be renamed to Yugoslavia in 1929, and ruled by Serbian Karađorđević dynasty till Second World War. After the formation of Yugoslavia, Serbia