During World War II the most dangerous part of our military was the infantry, followed by the Army Air Corps. Percentage wise, the two top fatality ratio of all branches. But the third place spot for highest fatality rate falls onto a small part of the military. A group with an important mission but little defensive/offensive training - the Chaplain Corps.
During WWII there were over 100 chaplains lost in combat between the Army and the Marines alone. A group of people who; did not carry a weapon, aided numerous people, combatants and civilians alike, assisted with the wounded and who were often found at the front line.
As the USS Dorchester was sinking records indicate that the four chaplains on board gave their life jackets to other men, effectively giving their lives that others may live.