I wonder how much effort it would have taken to turn that island into a fortress, since pretty much everything they need is already there. They could have just cut off Midway and Wake, just starve them off those islands.
The the time, were there any other military bases in the Hawaiian Islands, other than Oahu?
I was thinking about this yesterday. If the Japanese captured the island and the first thing they dis was offer the island's independence from the US for their cooperation. That would make occupying a wee bit easier, but that would happen because of bushido.
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