The Ustaše (pronounced ), also known by anglicised versions Ustasha or Ustashe, was a Croatian fascist and ultranationalist organization active, as one organization, between 1929 and 1945, formally known as the Ustaša – Croatian Revolutionary Movement (Croatian: Ustaša – Hrvatski revolucionarni pokret). Its members committed regicide of the King of Yugoslavia, while later they also murdered hundreds of thousands of Serbs, Jews, Roma as well as Croatian political dissidents during World War II in Yugoslavia. The ideology of the movement was a blend of fascism, Roman Catholicism and Croatian ultranationalism. The Ustaše supported the creation of a Greater Croatia that would span the Drina River and extend to the border of Belgrade. The movement emphasized the need for a racially "pure" Croatia and promoted genocide against Serbs—due to the Ustaše's beliefs grounded in anti-Serb sentiment—and Jews and Roma via Nazi racial theory, and persecution of anti-fascist or dissident Croats and Bosniaks. The Ustaše viewed the Bosniaks as "Muslim Croats", and as a result, Bosniaks were not persecuted on the basis of race. The Ustaše espoused Roman Catholicism and Islam as the religions of the Croats and condemned Orthodox Christianity, which was the main religion of the Serbs. Roman Catholicism was identified with Croatian nationalism, while Islam, which had a large following in Bosnia and Herzegovina, was praised by the Ustaše as the religion that "keeps true the blood of Croats." It was founded as a nationalist organization that sought to create an independent Croatian state and functioned as a terrorist organization before World War II. In April 1941, the Ustaše came to power when they were appointed to rule a part of Axis-occupied Yugoslavia as the Independent State of Croatia (NDH), a quasi-protectorate puppet state established by Fascist Italy and Nazi Germany. The Ustaše Militia (Croatian: Ustaška vojnica) became its military wing in the new state. The Ustaše regime was militarily weak and lacked general support among Croats, struggling to ever attain significant support among the populace. Therefore, terror would be their means of controlling the “ethnically disparate” population. The Ustaše regime was initially backed by some parts of the Croat population that during the interwar period had felt oppressed in the Serb-led Yugoslavia, but their brutal policies quickly alienated many ordinary Croats and resulted in a loss of the support they had gained by creating a Croatian national state. With the German surrender, end of World War II, and the establishment of socialist Yugoslavia in 1945, the Ustaše movement, along with their state, totally collapsed. Many members of the Ustaše Militia and Croatian Home Guard were subsequently massacred by the new government in the Bleiburg repatriations. Underground and exile successor organisations, such as the Crusaders guerrilla and Croatian Liberation Movement were created by former Ustaše members and tried to continue the movement, without results.

Ustaše - Wikipedia