It was located near the city of Fismes, in the Marne department, on the plateau above the village of Courville, east of the farm "La Bonne Maison".

[1] It was built some time in early 1917, with the "Groupe de Combat no 12" arriving on 26 March, in support of the French 6th Army.

After the start of the German Spring offensives, 103rd Aero Squadron left GC no 21 and flew to La Bonne Maison, with the French 6th Army, then moved to Flanders on 30 April with French "Détachement d'Armée du Nord" during the Battle of the Lys.

[3] On 30 April, with the battle ended, the squadron again moved by train to Bray-Dunes aerodrome, near Dunkerque for operations in the Flanders area with the French "Détachement d'Armée du Nord".

This article incorporates public domain material from the Air Force Historical Research Agency