The Kingdom of Yugoslavia was a state in Southeast and Central Europe that existed from 1918 until 1941. From 1918 to 1929, it was officially called the Kingdom of Serbs, Croats and Slovenes, but the term "Yugoslavia" (literally "Land of South Slavs") was its colloquial name due to its origins. The official name of the state was changed to "Kingdom of Yugoslavia" by King Alexander I on 3 October 1929. The new kingdom was made up of the formerly independent kingdoms of Serbia and Montenegro (Montenegro having been absorbed into Serbia the previous month), and of a substantial amount of territory that was formerly part of Austria-Hungary, the State of Slovenes, Croats and Serbs. The main states which formed the new Kingdom were the State of Slovenes, Croats and Serbs; Vojvodina; and the Kingdom of Serbia with the Kingdom of Montenegro.