U
- UAV – Unmanned Aerial Vehicle
- UBLE – Universal Bridge Launching Equipment
- UCVP – Universal Combat Vehicle Platform
- UDR – Ulster Defence Regiment
- UET – Universal Engineer Tractor (US)
- UGV – Unmanned Ground Vehicle
- ULC – Unit Load Container
- UMA – Universal Mounting Adapter
- UMP – Universal Machine Pistol
- USA – United States of America/United States Army
- USAADS – U.S. Army Air Defense School
- USAARMS – U.S. Army Armor School
- USAAVNS – U.S. Army Aviation School
- USAAF – United States Army Air Forces
- USAF – United States Air Force
- USCG – United States Coast Guard
- USMC – United States Marine Corps
- USN – United States Navy
- USP – Universal Self-loading Pistol
- UTL – Universal Tactical Light
- UTM – Universal Transverse Mercator
- UTS – Universal Turret System
- UV – Ultraviolet
- UW – Urban Warfare
Read more about this topic: Glossary Of Military Abbreviations