The first operational unit to use Berteaux was the 310th Bombardment Group and its 379th, 380th, 381st and 428th Squadrons, flying B-25 Mitchells. Elements of the group arrived in late December 1942 from Telergma Airfield, with Group HQ arriving on 1 January 1943. The group engaged primarily in support and interdictory operations against German forces in Algeria and Tunisia.