Doesn't look like my original text made the cut.
After over 600 frustrating hours total playing this game, I finally got to what I would consider a successful result for USA along the standard allies route.
The war started on May 16, 1941. It took only a few months to clear the Pacific and take Japan but they were so ingrained in China that I had to take that out too. It was probably the only thing that kept India from being over-run too. Surprisingly my AI British, Raj and Australian allies didn't do too badly. They kept Italy busy and by the time I broke through Southern France, they were pretty well pacified. The Soviets opened up another front in Denmark, which was surprising because it looked like WWI on the Eastern Front. All this while I took what started as dozen divisions to crush the Germans and Italians through most of Africa. My forces at war's end: 124 Infantry division (mostly 20-width but some 40 and garrison), 33 motorized infantry, 7 marine divisions, 26 light tank, 11 medium tank and 4 heavy divisions; 13 CV, 22 BB, 33 CA, 59 CL, 258 DD and 164 subs; 3992 fighters, 1550 heavy fighters, 1849 CAS, 1192 naval bombers, 650 tactical bombers, 450 strategic bombers plus many more thousands in reserve. I gave back most of my German and Italian gains back to those Republics. Less than three years from start to finish.