 II./KG 55 could muster 36 He 111s (24 operational) and 17 of 36 He 111s on strength with III./KG 55 were combat ready.The units were to be engaged in counter-air operations against the French "Armée de l'air".Stab./KG 55 began operations on 10 May in the Lorraine region of France, which would include missions over Nancy, Toul and Epinal.