After the collapse of Yugoslavia, on April 11, 1941 the Nazis installed a puppet regime in Croatia headed by Ante Pavelic, a terrorist who lead the clero-fascist Ustasha movement. Pavelic and his followers had been in exile in Italy under the protection of Mussolini and were wanted in both France and Yugoslavia for orchestrating the assassination of King Alexander of Yugoslavia and French Foreign Minister Louis Barthou. The regime he established in Croatia was called the NDH (Independent State of Croatia). It was run by the Ustasha party, an organization which combined fascist and Catholic ideologies with the goal of building a Croatia cleansed of its ethnic and religious rivals, the Eastern Orthodox Serbs.