| Abbreviation | Definition |
|---|---|
| USAAS | United States Army Air Space |
| USAAS | United States Army AirSpace |
| USAAS | United States Army Ambulance Service |
| USAAVNBD | United States Army Aviation Board |
| USAAVNC | United States Army Aviation Center |
| USAB | United States Army Band |
| USAB | United States Army Barracks |
| USAB | United States Army Berlin |
| USAC | U. S. Africa Command |
| USAC | United States Air Corps |
| USAC | United States Army Cadet |
| USACAC | United States Army Combined Arms Command |
| USACASCOM | United States Army Combined Arms Support Command |
| USACC | United States Army Communications Command |
| USACCA | United States Army Concepts Analysis Agency |
| USACCSA | United States Army Command and Control Support Agency |
| USACE | AS Army Corps of Engineer |
| USACE | U S Army Corps of Engineers |
| USACE | U.S. Army Corps of Engineers |
| USACE | United States Army Corps of Engineers |