US needs more starting infantry to offset the cost of having to buy so many boats.
The US really gets hamstrung by the fact that it can’t afford  7 IPC transports for every two units it has….and still afford anything more than a destroyer or two.
If the US started with maybe like 6-9 more infantry, it would allow them to afford an extra cruiser, or bomber, or something a turn and give them a little more punch.
But don’t think of this as a US bid, because the infantry technically cant do anything to anyone until the US buys the boats and transports and tanks and artillery to use them somewhere.