Collaboration with the Axis Powers

The Ustaše (), 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 (). From its inception and before the Second World War, the organization engaged in a series of terrorist activities against the Kingdom of Yugoslavia, including collaborating with IMRO to assassinate King Alexander I of Yugoslavia in 1934. During World War II in Yugoslavia, the Ustaše went on to perpetrate the Holocaust and genocide against its Jewish, Ser

second Serbian collaborationist puppet government (after the Commissioner Government) established in the German-occupied territory of Serbia during World War II in Yugoslavia

Finnish infantry regiment during the Continuation War made up mostly of Estonian volunteers

military unit