Of being conquered by the Japanese, I mean. I've never been real clear on this question. Perhaps this is sort of an alternate history question, as it would require a different outcome at the Battle of Midway. Or would it? The best Japanese chance to occupy Oahu may have been on Dec. 7 '41, not in June of '42 subsequent to a Midway battle with a different outcome. Anyhow, let's say the USN was devastated at Midway, lost all 3 carriers, with 3 or 4 of the carriers of Kido Butai surviving, and Japan successfully occupied Midway (which would have been no small achievement by itself). Was Hawaii, Oahu specifically, truly in existential danger? Seems I picked up some historical narrative somewhere along the way that it would have been, and the Battle of Midway was in effect a battle to defend Hawaii, but I'm having a hard time seeing that. I do not believe the IJN of 1942 was capable of bagging an alerted Oahu - too much shore based air power on the US side - and I question whether Japan could have brought enough air power to bear, either ship borne or launched from Midway, to reduce Oahu enough for an invasion. However, the key word in all that was when I referred to an "alerted" Oahu..... had Japan brought along an invasion force on Dec. 7 '41, perhaps an occupation would have been possible. It would have been difficult for the IJN to support and resupply the occupation force across all that ocean, but it would have been equally difficult, probably moreso, for the USN of 1942 to mount a liberation of the Hawaiian islands - the USN of 1944 could have accomplished it. Of course a larger invasion force in Dec. 41 increases the chances of the element of surprise being lost. Truly they'd have needed a bigger word than audacious had Japan attempted such an operation. I'm new here and this is only my 2nd post. Maybe you all here have already asked and answered this question. But I see plenty of good discussion of Midway here so I figure this is up your alley.