Heeresgruppe F
In November 1944 the 1st Cossack Division was taken over by the Waffen-SS. The SS Führungshauptamt reorganized the division and used further Cossack combat units from the army and the Ordnungspolizei to form a 2nd Cossack Division. Both divisions were placed under the command of the XV SS Cossack Cavalry Corps on 1 February 1945. With the transfer of the Volunteer Cossack-Stamm-Regiment 5 from the Freiwilligen-Stamm-Division on the same day the takeover of the Cossack units by the Waffen-SS was complete. According to Samuel J. Newland, the Corps, composed of the 1st and 2nd Cavalry Brigades and the 1st and 2nd Division, was actually formed on 25 February 1945, when it was officially created by the High Command. The Corps was initially subordinated to the Army Group F in Croatia, and since March 1945 to the Army Group E in Croatia.