IV Corps Observation Group
| IV Corps Observation Group | |
|---|---|
Officers and men of the 135th Aero Squadron, November 1918, Croix de Metz Aerodrome (Toul), France | |
| Active | 1 July 1918 – 12 May 1919 |
| Country | United States |
| Branch | Air Service, United States Army |
| Type | Group |
| Role | Command and Control |
| Part of | American Expeditionary Forces (AEF) |
| Engagements | World War I
Occupation of the Rhineland |
| Insignia | |
| Identification symbol | 135th Aero Squadron 8th Aero Squadron |
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.