My father was a US Army dentist in WII, Pacific theatre. As a "jaw breaker" he saw some horrific head wounds, as it was the practice to send the head injuries to the dentist, so he could patch them up well enough to get them back to the transport ship.
He also had some unnerving times as Japanese snipers loved to shoot medical officers and nurses. He lost a few close friends that way. And he also went nuts, and was sent to Honolulu for R&R in a psych ward. My mother was in Wisconsin with a toddler ( my oldest brother ), and was beside herself with worry because after 6 months in the hospital, my father stopped writing.
A year later, the Red Cross finally located him. He was arrested on Tinian, because he had no security clearance. Tinian was having a security sweep in preparation for the Enola Gay mission.
My father's wartime rank was Major. And as a Major, no one questioned him, or asked to see his orders when he would board a plane for an island destination as a hitcher. This was a common practice in the Pacific. What was uncommon, was my father. He simply flew from island to island, seeing the sights of the Pacific, totally AWOL, for a year.
Oddly, he wasn't punished... just flown back to Honolulu, and the hospital, where he stayed until he was honorably discharged, and sent back to Wisconsin ( probably under guard ).
He was nearly 80 years old before he told my mother what he did in the war.. he couldn't remember. Perhaps the hospital did something to his memory.
He was very patriotic and had the highest respect for fellow servicemen 'til the day he died. He never joined any post-war organizations ( such as the American Legion ), nor did he ever claim any veteran's benefits. But his headstone has a service ensignia, by my mother's request. He hated war and all forms of violence. He was a dentist post-war for about 12 years, then quit and became an autoworker.
Dick