Hacksaw Ridge, the name of a place in Okinawa (Japan) where some of the bloodiest fighting happened during World War II, is a 2016 war movie directed by Mel Gibson, based on the 2004 documentary The Conscientious Objector. The film tells the story of Desmond Doss, played by Andrew Garfield, an American pacifist combat medic during WWII who, as a Seventh-day Adventist Christian, refused to carry or use a weapon or firearm of any kind.
Doss became the first conscientious objector to be awarded the Medal of Honor, for service above and beyond the call of duty during the Battle of Okinawa. The movie includes violent scenes that are difficult to watch—yet is very inspiring.
More on Wikipedia