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| INITIAL TRAINING SCHOOL, VICTOR HARBOUR | |
| INTELLIGENCE UNITS | |
| | NT ALLIED INTELLIGENCE BUREAU | |
| | NT CENSORSHIP UNITS | |
| | NT CENTRAL BUREAU OF INTELLIGENCE | |
| | NT COASTWATCHERS | |
| | NT FIELD SECURITY UNITS | |
| | NT NORTH AUSTRALIAN OBSERVER UNIT | |
| | NT PHOTOGRAPHIC INTERPRETATION UNITS | |
| | NT PHOTOGRAPHIC RECONNAISSANCE UNITS | |
| | NT SERVICES RECONNAISSANCE DEPARTMENT | |
| | NT SPECIAL INVESTIGATION BRANCH | |
| | NT TRANSLATOR AND INTERPRETER UNITS | |
| IRAQI FORCES | |
| ITALIAN AIR FORCE | |
| ITALIAN ARMY | |
| ITALIAN FASCIST PARTY | |
| ITALIAN NAVY | |
| ITALIAN NAVY SHIPS | |
| ITALIAN POW CAMPS | |
| ITS KINGAROY | |
| ITS SOMERS | |
| ITS VICTOR HARBOUR | |
| ITSS | |
| IWGC | |
J unit names | |
K unit names | |
L unit names | |
M unit names | |
N unit names | |