Ustasha – Croatian Revolutionary Organization (Croatian: Ustaša - Hrvatska revolucionarna organizacija) was Croatian nationalist organization which was founded on January 7, 1929 in Italy by Ante Pavelić. Organization was founded after the assassination of Croatian Peasant Party leader Stjepan Radić in the Yugoslav National Assembly on June 20, 1928.
Organization was ruled Independent State of Croatia during its whole existence (April 10, 1941 - May 8, 1945) during World War II.