He served as a general for some operation I think was called Mersetti. Although he used to be a general he was kept around at UNATCO as a mere quartermaster.
From what I could observe, he was fairly patriotic tho not completely oblivious. He had moral principles rare in the minds of typical generals but present in the minds of the greatest.
And yet, he still seems in some way afflicted. They made it so subtle, but it's as though having gone through the drilling of military indoctrination, Carter was ever so slightly brainwashed.