| U |
 |
| U-Boat |
Unterseeboot
- "under sea boat"- Abbreviated name for German
submarines |
| U-Go |
Operational
code name for the Japanese push towards India
from Burma - March 1944 |
| Ultra |
Code
name and security caveat given to decoded messages
and intelligence originating from German Enigma
encrypted sources |
| Uranus |
Operational
code name for the Soviet counter-offensive at
Stalingrad to surround the German 6th Army - November
1942 |
| USAAF |
United
States Army Air Force |
| USN |
United
States Navy |
| USS |
United
States Ship |
| Utah |
Code
name for D-Day
landing area near Les Dunes de Vatreville, Normandy |
| UXB |
Unexploded
bomb |
