USF tier structure is kinda weird. It should be:
Starting fuel: 20
Lieutenant (20F):
HMG / Pack Howie / ATG
Captain (40F requires LT):
M20 / AA HT / Stuart
Major (110F requires Cpt):
No changes.
This should allow USF to actually have access to all basic support weapons (HMGs, ATGs, indirect fire) relatively early.
Light vehicles are locked behind 60 fuel (80 for Soviet T3, 60 for Ost T2); Medium tanks are locked behind 170 fuel (180 for Pr0stheer / 170 for Soviets).
EDIT: The LT himself would probably come out too early. He shouldn't be free then, I guess.
LT cost should be 280mp 20 fuel, but I do like the placement of all the support weapon in one location.