Korück (short for German: Kommandant rückwärtiges Armeegebiet) is an abbreviation for Army Rear Area Commander.
It referred also to the staff of various units and of varying sizes assigned to the Wehrmacht Armeeoberkommando.
For example, after the Operation Barbarossa, Korück 582 was given the task of controlling the 9th Army's rear area at the time when its greatest expansion covered around 27,000 km2 (10,000 sq mi) with more than 1,500 villages around Vyazma.
The Korück was responsible for securing the supply routes and "pacifying" the occupied area.
The transit camps for prisoners of war (Dulag) were usually controlled by Korücks.