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| PORT OPERATING UNITS | |
| PORTUGUESE FORCES | |
| POST MASTER GENERAL'S DEPARTMENT | |
| POST OFFICES | |
| POSTAL UNITS | |
| POW AND INTERNMENT CAMPS | |
| PRAHRAN REGIMENT | |
| PRINCE OF WALES LIGHT HORSE | |
| PRINTING AND STATIONERY UNITS | |
| PROVOST UNITS | |
| PUBLIC RELATIONS UNITS | |
| PUNISHMENT UNITS | |
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U unit names | |
| U BOATS | |
| U HEAVY BATTERY | |
| UN PEACEKEEPING FORCES | |
| UNAMIR - UN ASSISTANCE MISSION IN RWANDA | |
| UNIFIL - UN INTERIM FORCE IN LEBANON | |
| UNITAF UNIFIED TASK FORCE IN SOMALIA | |
| UNITED NATIONS | |
| UNITED NATIONS PEACEKEEPING FORCES | |
| UNITED PROTESTANT ASSOCIATION | |
| UNITED STATES AIR FORCE | |
| UNITED STATES ARMY | |
| UNITED STATES ARMY VESSELS | |
| UNITED STATES FORCES | |