[1] The squadron was initially formed in early August 1917 at Jefferson Barracks, Missouri, where 150 civilians were sworn into the United States Army as soldiers.

After six weeks of indoctrination, the squadron was ordered for overseas duty, moving to Hazelhurst Field#2, Garden City, Long Island on 13 October.

From there, the squadron was moved to Camp Sorden and placed under the control of the British Royal Flying Corps (RFC) for training.

After several more weeks of final training by the RFC, the squadron was ordered to France on 1 June, and moved to the Flower Down Rest Camp, Winchester.

[2] On 17 August 1918 the 93d Squadron was reminded that there was a war in progress when Lieutenants Meyer, Rummell and Wright met five enemy Albatross aircraft north of Pont-a-Mousson in a heavy mist.

[2] The beginning of September brought increasing activity to the squadron, as the First Army was organized and concentrated in the Saint-Mihiel Sector for its first independent operation.

During the buildup period, in not to call attention of the enemy, the squadron was ordered to avoid crossing the lines and to fly in small formations.

Orders were given for the squadron to fly with a patrol of 6 aircraft to attack with machine guns a column of German infantry on the road between Chambley and Waverly.

On 21 September the 3d Pursuit Group moved to Lisle-en-Barrois Aerodrome, where it made ready for a new offensive on the Verdun front.

Rummer and Mertz were met by heavy enemy machine gun fire from the ground, but Lt Wright was able to drop his bombs and safely turned back.

[2] On 26 September First Army began its great offensive near Verdun, and in response the German Air Service responded, very much reinforced.

[2] The 93d Aero Squadron moved on 5 November to Foucaucourt Aerodrome, however weather conditions limited its operations to below the clouds and to attacks on enemy infantry forces on the ground.

The squadron remained at Foucaucourt until 15 December when it was ordered to the 1st Air Depot at Colombey-les-Belles Airdrome and turned in all of its aircraft and equipment.

[2] Personnel at Colombey were subsequently assigned to the commanding general, services of supply, and ordered to report to one of several staging camps in France.

There, personnel awaited scheduling to report to one of the base ports in France for transport to the United States and subsequent demobilization.