By the beginning of the Meuse-Argonne Offensive the Air Service AEF consisted of 32 squadrons (15 pursuit, 13 observation, and 4 bombing) at the front, while by November 11, 1918, 45 squadrons (20 pursuit, 18 observation, and 7 bombardment) had been assembled for combat. During the war, these squadrons played important roles in the Battle of Château-Thierry, the St-Mihiel Offensive, and the Meuse-Argonne. Several units, including the 94th Pursuit Squadron under the command of Capt. Eddie Rickenbacker, and the 27th Pursuit Squadron, which had "balloon buster" 1st Lt. Frank Luke as one of its pilots, achieved distinguished records in combat and remained a permanent part of the air forces.