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  | Prince Alexander Range |
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  | Rabaul |
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  | Rabi |
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  | Ramu River–Finisterre Range |
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   | Ramu River Finisterre Range |
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  | Russell Island |
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  | Saidor |
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 | 112th Line of Communication Hospital (Japanese) |
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  | 123rd Line of Communication Hospital (Japanese) |
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 | 20th Division 2086 Unit (Japanese) |
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  | 20th Division 2nd Field Hospital (Japanese) |
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 | 20th Division 78th Infantry Regt 1st Coy (Japanese) |
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  | 20th Division 78th Infantry Regt 2nd Coy (Japanese) |
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 | 20th Division 78th Infantry Regt (Japanese) |
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 | Siberia Maru (Japanese) |
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  | Salamaua |
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  | Sangara |
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  | Sarang |
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  | Sattelberg Area |
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