Highest you can be is four, I think. Five-stars are ceremonial and awarded in times of war.
I doubt Captain was his official rank, because a Captain needs to have minimum four years in the Army and Steve just didn't have time for that, plus IIRC officers are required to have a college education.
no subject
I doubt Captain was his official rank, because a Captain needs to have minimum four years in the Army and Steve just didn't have time for that, plus IIRC officers are required to have a college education.