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| ROYAL NAVAL RESERVE | |
| ROYAL NAVY | |
| ROYAL NEW SOUTH WALES LANCERS | |
| ROYAL NEW SOUTH WALES REGIMENT | |
| ROYAL NEW ZEALAND AIR FORCE | |
| ROYAL NEW ZEALAND NAVY | |
| ROYAL PAPUAN CONSTABULARY ROYAL QUEENSLAND REGIMENT | |
| ROYAL REGIMENT OF AUSTRALIAN ARTILLERY | |
| ROYAL SOUTH AUSTRALIA REGIMENT | |
| ROYAL TASMANIA REGIMENT | |
| ROYAL VICTORIA REGIMENT | |
| ROYAL WESTERN AUSTRALIA REGIMENT | |
| RPC | |
| RSL | |
| RSSAILA | |
| RSSILA | |
| RUSSIAN FORCES S CMD | |
S unit names | |
T unit names | |
U unit names | |
V unit names | |
W unit names | |
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 | |