Not only that, he was a "conscientious objector" and refused to carry a gun and kill the enemy since it was against his religious beliefs.

He was in the war with no gun. He was a medic, so he didn't think he needed a gun. He was awarded the Medal of Honor by President Truman.

Surprisingly, the movie was not an American or Japanese production. It was Australian. Most of the actors were Australian and it was filmed in Australia. Too bad no filming in Okinawa.