Maspok (after Masovni pokret (Croatian), i.e. Mass movement) or Croatian spring was a nationalistic and a secessionist movement in the Socialist Republic of Croatia, Yugoslavia during the year of 1971. The movement demands were initially around exclusion of Serbian language use and the exclusive use of the Croatian language in Croatia, declaration of Croatia as a national state of Croats and Croatia as a sequel of the medieval Croatian kingdom. The ultimate Maspok goal was independent Croatian state. The Maspok movement was supported by a great part of the Croatian Communists, Croatian republic political leadership, and the Ustaše emigration in the West.