Strategy for a game and historical accuracy are different things. Remember, this is a game, not a recreation of history. At best it is a “what if” but more accuractely, it is a game of the World War II flavor.
If you make the game historically accurate (IL did this for revised once) you make it unplayable. Historically speaking, America should have thrice the carrier groups, at least double the aircraft, England hsould have way more destroyers, America should not be limited to coastal territories on the Atlantic board, Russia should be able to declare whenever they want on whomever they want and probably have a lot more infantry (maybe roll the dice to see if they actually show up or something.) After America’s in the war, China should be able to buildwhatever htey want to represent gifts from America. England should either stand together or fall together, none of this split stuff. Germany should probably have five times as many submarines and all scattered around the north and central atlantic…
As you can see, things get really messy and balance goes out the window quickly.