In February 1943, following the Casablanca conference of January that same year, General Dwight D. Eisenhower became the supreme commander of all allied forces in North Africa campaign.
Alexander became Eisenhower's deputy and at the same time commander of the 18th Army Group, which controlled the First and Eighth armies and the separate U.S. II Corps.
Air chief marshal Sir Arthur Tedder assumed command of the allied forces, and admiral Cunningham retained command of the naval forces. It was under this revised command structure that the Allies decisively defeated Axis forces in the North Africa campaign.
