The IV Corps Observation Group was an Air Service, United States Army unit that fought on the Western Front during World War I. It was demobilized on 12 May 1919. There is no modern United States Air Force unit that shares its lineage and history.
Foucaucourt Aerodrome was a temporary World War I airfield in France. It was located 4.3 miles (6.9 km) ESE of Foucaucourt-sur-Thabas, in the Meuse department in Lorraine in north-eastern France.
Touquin Aerodrome was a temporary World War I airfield in France. It was located 1 mile (1.6 km) west of Touquin in the Île-de-France region in northern France.
Rembercourt Aerodrome was a temporary World War I airfield in France. It was located 1.6 miles (2.6 km) east-northeast of Rembercourt aux Pots, now part of Rembercourt-Sommaisne, in the Meuse department in northeastern France.
Vavincourt Aerodrome, was a temporary World War I airfield in France. It was located 0.5 miles (0.80 km) south of Vavincourt, in the Meuse department in north-eastern France.
Maulan Aerodrome, was a temporary World War I airfield in France. It was located 0.2 miles (0.32 km) South-Southwest of the commune of Maulan, in the Meuse department in Lorraine in north-eastern France.
Delouze Aerodrome was a temporary World War I airfield in France. It was located 0.8 miles (1.3 km) NE of Delouze-Rosières, in the Meuse department in Lorraine in north-eastern France.
Belrain Aerodrome was a temporary World War I airfield in France. It was located 0.7 miles (1.1 km) South of Belrain, in the Meuse department in the Lorraine region in northeastern France.
Souilly Aerodrome was a temporary World War I airfield in France. It was located 1 mile (1.6 km) Northeast of Souilly, in the Meuse department in north-eastern France.
Julvécourt Aerodrome was a temporary World War I airfield in France. It was located 0.4 miles (0.64 km) West of Julvécourt, in the Meuse department in Lorraine in north-eastern France.
Ourches Aerodrome, was a temporary World War I airfield in France. It was 0.7 miles (1.1 km) West-Northwest of the commune of Ourches-sur-Meuse, in the Meuse department in Lorraine in north-eastern France.
May-en-Multien Aerodrome, was a temporary World War I airfield in France. It was located 1/2 miles south of the commune of May-en-Multien, in the Île-de-France region in north-central France.
Coincy Aerodrome was a temporary World War I airfield in France. It was located 1.0 mile (1.6 km) W of Coincy, in the Aisne department in north-eastern France.
Remicourt Aerodrome was a temporary World War I airfield in France. It was located 1.2 miles (1.9 km) West of Remicourt, in the Marne department in north-eastern France.
Ferme de Moras Aerodrome, was a temporary World War I airfield in France. It was 1.9 miles (3.1 km) East of the commune of La Ferté-sous-Jouarre, in the Île-de-France region in north-central France.
Saizerais Aerodrome, was a temporary World War I airfield in France. It was located 0.5 miles (0.80 km) southwest of Saizerais, in the Meurthe-et-Moselle department in north-eastern France.
Lay-Saint-Remy Aerodrome, was a temporary World War I airfield in France. It was located 0.7 miles (1.1 km) West-Northwest of the commune of Lay-Saint-Remy, in the Meurthe-et-Moselle department in north-eastern France.
The Third Army Air Service was a United States Army Air Service organization stationed in France and Occupied Germany in the immediate aftermath of World War I. It was demobilized in Germany on 2 July 1919. There is no modern United States Air Force unit that shares its lineage and history.
Chaumont-Hill 402, was a temporary World War I airfield in France, named after the height of its highest point. It was located East South East of the city of Chaumont, in the Haute-Marne department in the Champagne-Ardenne region of north-eastern France, between the main road and the "Ferme d'Heurtebise", 0.5 miles (0.80 km) west of the village of Laville aux Bois.
Air Service, United States Army 
