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| US ARMY 135 MEDICAL REGIMENT | |
| US ARMY 14 CORPS | |
| US ARMY AIR CORPS | |
| US ARMY AMERICAL DIVISION | |
| US ARMY ENGINEER BOAT AND SHORE REGIMENTS | |
| US ARMY MEDICAL CORPS | |
| US ARMY NURSE CORPS | |
| US ARMY SPECIAL ENGINEER BRIGADES | |
| US ARMY VESSELS | |
| USAAC | |
| USAAF | |
| USMC | |
| USN | |
| USS FRANK E EVANS | |
| USS LEXINGTON | |
| USSR FORCES | |
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Y unit names | |
| YANCO PRISONER OF WAR CAMP | |
| YARROWEE LIGHT HORSE | |
| YMCA | |
| YOUNG MEN'S CHRISTIAN ASSOCIATION | |
| YOUNG WOMEN'S CHRISTIAN ASSOCIATION | |
| YOUTH ORGANISATIONS | |
| YUGOSLAV FORCES | |
| YWCA | |
Z unit names | |