Army Group D was formed on 26 October 1940 in France, its initial cadre coming from the disbanded Army Group C. On 15 April 1941, the status of Army Group D was upgraded. From that date on, the commander of Army Group D was also to be considered Oberbefehlshaber West (or OB WEST - the Commander in Chief for the Western Theatre). As a result of this, Army Group D is sometimes incorrectly referred to as Army Group West.