The corps was established after the deposition of Benito Mussolini and was formed with the most efficient division of Regio Esercito. The goal of the Corps was to defend Rome from an allied invasion but from the first days of September after the signing of the Armistice of Cassibile its primary task was to defend Rome from Germans. After the Badoglio Proclamation units of the corps fought against Germans but also due to the lack of orders from the highest political and militaries authorities the corps was disbanded in the days following 11 September 1943.