The Reichskommissariat Ukraine was established by Nazi Germany in 1941 during World War II. It was the civilian occupation regime of much of Nazi German-occupied Ukraine. It was governed by the Reich Ministry for the Occupied Eastern Territories headed by Alfred Rosenberg. Between September 1941 and August 1944, the Reichskommissariat was administered by Erich Koch as the Reichskommissar. The administration's tasks included the pacification of the region and the exploitation, for German benefit, of its resources and people. Adolf Hitler issued a Führer decree defining the administration of the newly-occupied Eastern territories on 17 July 1941.

The Transnistria Governorate was a Romanian-administered territory between the Dniester and Southern Bug, conquered by the Axis Powers from the Soviet Union during Operation Barbarossa. A Romanian civilian administration governed the territory from 19 August 1941 to 29 January 1944. A brief military administration followed, during which the Romanians withdrew from the region by late March 1944. German control became official on 1 April 1944.