The USA would have had to divert needed forces to have a Southern Command and Operational Area. Which forces and weapone one could only guess. The USA had at least 14 actual fleets of ships, the 15th saw only a "paper" fleet (Admiral Kings staff).

They would have to have enough Inf, and Armored Divs earmarked for fighting down there, and we probably would have asked for help from the Canadians and Australians bceause I think the British were already stretched a bit thin as it were. We might have even had Indian units there as well as they were excellent jungle fighters.

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Lost are only those, who abandon themselves) Hans-Ulrich Rudel.