I to incorporate the Vojvodina region, and previously independent Montenegro) to form the Kingdom of Serbs, Croats and Slovenes. The Committee's task was accomplished. Ante Trumbić later became an opponent of the June 1921 Vidovdan Constitution and the new Kingdom of Yugoslavia (January 1929). Ivan Meštrović refused to participate in state politics and committed himself to his art. He left the country permanently in 1942. See also Polish National Committee (1917–1919) Czechoslovak National Council Romanian National Committee (1918) History of Yugoslavia Croatia in the first Yugoslavia Croatian Committee References Yugoslav unification Kingdom of Yugoslavia 1910s in Yugoslavia Yugoslavism Organizations established in 1915 1910s in politics