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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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| 20th Division Finance Corps (Japanese) |
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| 20th Division Infectious Disease Prevention and Water Supply Unit Sanitation Group (Japanese) |
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| 20th Division Military Police (Japanese) |
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| 20th Division (Japanese) |
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| 20th Engineer Regt 2nd Coy 2nd Pl (Japanese) |
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| 20th Engineer Regt 2nd Coy (Japanese) |
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| 20th Engineer Regt (Japanese) |
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| 20th Field Machine Gun Coy (Japanese) |
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| 20th Home Division Medical Unit (Japanese) |
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| 20th Independent Mountain Artillery Battalion (Japanese) |
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| 20th Independent Mountain Artillery Bn 3rd Coy 2nd Pl (Japanese) |
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| 20th Independent Mountain Artillery Bn (Japanese) |
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| 20th Special Sea Duty Coy (Japanese) |
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| 20th Sub-chaser (Japanese) |
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| 210th Infantry Regt (Japanese) |
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| 211th Naval Construction Unit (Japanese) |
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| 212th Naval Construction Unit (Japanese) |
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| 219th Infantry Regt Headquarters (Japanese) |
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| 219th Infantry Regt (Japanese) |
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| 21st Field Air Supply Park 1st Branch Park (Japanese) |
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| 21st Field Air Supply Park (Japanese) |
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| 21st Independent Mix Bde 2nd Coy 1st Pl (Japanese) |
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| 21st Independent Mixed Bde Engineer Unit (Japanese) |
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| 21st Independent Mixed Bde Field Hospital (Japanese) |
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| 21st Independent Mixed Bde Independent Heavy Artillery Bn 2nd Coy 1st Pl 2nd Sect (Japanese) |
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| 21st Independent Mixed Bde Signals Unit (Japanese) |
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| 21st Independent Mixed Bde (Japanese) |
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