A Korpsabteilung (engl. Corps Detachment) was a division size infantry formation established by the German Wehrmacht during World War II.
During autumn and summer 1943 the Wehrmacht suffered heavy losses in men and materiel at the hands of the Red Army on the Eastern Front. At the same time, it had to conduct a build-up of military strength in France, prior to the expected invasion, and to reinforce the Italian theatre, where the Allies had crossed the Straits of Messina and landed at on the Italian mainland at Salerno, and Termoli in September 1943. The Ersatzheer could therefore no longer generate the replacements to bring up to strength formations that had been depleted in battle in the east.
In order to preserve the cadres and lineage of the divisions that had suffered heavy losses, to economise on supply and support effort, and probably to give an image of greater strength than really existed, the OKH decided to form Korpsabteilungen on the establishment of infantry divisions, i.e. containing three infantry regiments with two battalions each, an artillery regiment, and divisional troops (reconnaissance, anti-tank, pioneer, medical, and supply battalions). The staff of the Korpsabteilung was created from one of the divisions that were used to create them, while each of the infantry regiments represented one division. They were called Divisionsgruppe (Division Group), and each of the battalions in one of the Divisionsabteilung was called a Regimentsgruppe (Regimental Group). Unlike German infantry divisions, Korpsabteilungen were not numbered but identified by a letter.