My father was a US Army "combat medic", but in the 40s for a Black man that meant sanitation (the removal of bodies and parts from the battlefield.) The troops were segregated when he joined; desegregation came years later.
He never talked about it when he got home from the war. He told my brothers that the military could be a good life, but only if they got a college degree and went in as an officer. He didn't want them to experience what he had.