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 | 20th Division 26th Field Artillery Regt (Japanese) |
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| 20th Division 2nd Field Hospital (Japanese) |
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| 20th Division 4th Field Hospital (Japanese) |
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| 20th Division 78th Infantry Regt 1st Coy (Japanese) |
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| 20th Division 78th Infantry Regt 1st Infantry Gun Det (Japanese) |
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| 20th Division 78th Infantry Regt 1st Infantry Gun Pl (Japanese) |
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| 20th Division 78th Infantry Regt 2nd Bn Machine Gun Pl (Japanese) |
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| 20th Division 78th Infantry Regt 2nd Coy (Japanese) |
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| 20th Division 78th Infantry Regt 6th Coy (Japanese) |
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| 20th Division 78th Infantry Regt Conscript Reserve 1st Machine Gun Coy (Japanese) |
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| 20th Division 78th Infantry Regt (Japanese) |
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| 20th Division 79th Infantry Regt 67th Coy (Japanese) |
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| 20th Division 79th Infantry Regt (Japanese) |
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 | 20th Division 80th Infantry Regt (Japanese) |
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| Korea |
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| Melanesia (PNG, Irian Jaya & Solomon Islands) |
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| Bogadjim |
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| Erima |
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| Finschhafen |
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| Finschhafen Area |
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| Fortification Point–Sio Area |
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| Huon Peninsula |
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| Kwato |
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| Malala |
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| Marienberg |
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| Melanesia (PNG, Irian Jaya & Solomon Islands) |
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| New Guinea |
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| Ramu River–Finisterre Range |
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| Sattelberg Area |
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| Singorkai |
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