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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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| Salamaua |
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| Sangara |
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| Sarang |
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| Sattelberg Area |
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| Sepik River |
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| 18th Army HQ Military Police Sect KAMI Organization (Japanese) |
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| 6th Division (Australian) |
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| FAR EASTERN LIAISON OFFICE (Allied) |
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| Seram Sea |
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| Simbang |
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| Sio |
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| Solomon Islands |
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