I'm not a history expert at all but I think this is a massive over simplification, that ignore context of the time. My understanding is that the US was woefull

I'm not a history expert at all but I think this is a massive over simplification, that ignore context of the time. My understanding is that the US was woefully unprepared (particularly the Army) for WW2 due to its non interventionist stance in the years prior, and had to be reconstituted first. Moreover the U-boats were sinking large numbers of ships in the Atlantic that had to be dealt with.