First Army Air Service

First Army Air Service
1918 lithograph, Air Combat - Western Front
Active	10 August 1918 – 15 April 1919
Country	United States
Branch	Air Service, United States Army
Type	Air Service
Role	Command and Control
Part of	American Expeditionary Forces (AEF)
Engagements	World War I

The First Army Air Service was an Air Service, United States Army unit that fought on the Western Front during World War I as part of the Air Service, First United States Army. The First Army Air Service was the largest and most diverse Air Service combat organization of the American Expeditionary Forces in France, and most American Air Service combat units were assigned to it when assigned to the front.

The organization was demobilized in France on 15 April 1919 with the demobilization of the United States First Army. There is no modern United States Air Force unit that shares its lineage and history.

The history of the First Army Air Service dates to the first American Air Service personnel arriving in France. On 15 January 1918, Colonel William Mitchell was appointed Chief of the Air Service, I Corps, First Army. At this time, the I Corps was being formed for the purpose of administratively handling all of the American troops then on the Western Front. Headquarters was located at Neufchâteau, France. When the first American Aero Squadrons arrived at the front in April 1918, they were assigned to the quiet Toul Sector. At this time, the American Air Service on the front consisted of only a few Aero Squadrons of the 1st Pursuit Group.

At the end of June, 1918, Air Service, I Corps moved from the Toul Sector to the Château-Thierry Sector as part of I Corps. The I Corps Observation Group was already in the Chateau-Thierry Sector was under the command of First Army. The Assistant Chief of Air Service, Zone of Advance, felt it was necessary to coordinate the observation groups of First Army with the pursuit groups. On 10 August 1918, the First American Army Air Service was established.

The unit was formally organized on 26 August at Ligny-en-Barrois, France It consisted of the French Aerial Division, which consisted of a large number of pursuit and day bombardment squadrons. In addition, there was one other French pursuit group and three American pursuit groups-one American day-bombardment group-the 1st Army observation, and one French Army artillery group for the adjustment of long-range artillery fire. Eight night-bombardment squadrons of the British Royal Air Force. were to cooperate with the First Army Air Service whenever the tactical situation made such action expedient. The establishment of the First Army Air Service marked the first concentration of American air forces under its own commander.