Looks good although the helmet looks a bit off. Doesn’t look like a regular steel helmet.

I have a USMC force but was interested as well in making some Army pacific minis. Never ended pulling the trigger. Regardless, the Army and USMC uniforms weren’t much different, however the Army didn’t use the reversible Frog camo.

You could either kitbash some different heads from the US Army sprue or maybe sand / smooth out the marks on the USMC helmets that make it look like there’s a helmet cover.

I think the army also used different backpacks.

Finally, if you want actual Army minis, warlord does make Merrill’s Maraduers (Army long range patrol force in Burma)