You're talking about a different period than I just was among other things.Sea Skimmer wrote: That would be true if you ignore just how fucking insanely stingy the US military establishment had to be in that era. It robbed the forces of any real combat effectiveness. The British were not in a much better situation, but Japan was the utter opposite and built and prepared itself into a position in which they just could not fail, at least for the sweep to the south. Even if the US fleet was intact it wouldn't matter, because it had no bases and nothing able to support it west of Hawaii. If you read the reports and Morrisons on the early USN operations you'll see a steady pattern of a fleet which was unable to hit anything. Our cruisers in one instance failed to sink an anchored Japanese transport in a lagoon. Meanwhile in the Philippines US pilots could not intercept Japanese planes with what few aircraft they had, because they had no oxygen equipment. None had ever been produced. Even when you look at our great victory at Midway, we have a stark contrast an aircraft effectiveness even months into the war. US surface forces would get kicked around into 1943 until we just basically dominated the Japanese with radar equipped aircraft, preventing almost all further surface battles. That kind of advantage is not to be expected, all the more so if you want defense spending scaled back.
The US was in fact doing much better in surface engagements by the 1943 period, and in fact generally decisively won the late war conflicts.
Your last observation is accurate, but it does depend on what your priorities were. In spite of fears to the contrary, the US proper was never actually under threat of invasion during WW2. The isolationists were correct from that perspective, even with the Pearl Harbor attack occurring, its just a matter of the long term strategic implications of doing so and the reality about not being able to protect the Philippines. (I'm not saying they were right in what they advocated, just that their viewpoint was not in fact really that irrational since the US did have time to buildup its military to protect itself even once WW2 had started. Without carriers altering the greater picture, the naval strength of the US from the start would have been even stronger, and an effective surprise strike can't be pulled off the same way with merely surface ships.)