Vegan dietitian John Westerdahl sent us this information:

The new motion picture Hacksaw Ridge tells the story of Corporal Desmond Doss, a Seventh-day Adventist combat medic who unarmed, single-handedly rescued 75 soldiers during the battle of Okinawa, in the midst of a hail of enemy gunfire. The battle is recognized by historians as one of the bloodiest battles of World War II. For his unselfish acts of heroism, Doss was awarded America’s highest military distinction the Congressional Medal of Honor. Doss, a Private First Class at the time of the Battle of Okinawa, is presented as a devout Seventh-day Adventist, who holds firm to keeping the Sabbath, a vegetarian diet, and refusal to bear arms of any kind. He was maligned and physically abused by fellow recruits and ostracized by commanding officers who sought to drum him out of the Army.

Desmond Doss, who passed away ten years ago, was a devout member of the Seventh-day Adventist Church.
Here is an interview of Desmond Doss.

http://memory.loc.gov/diglib/vhp/story/loc.natlib.afc2001001.32978/mv0001001.stream?start=2062&clipid=d25083e237