During World War II, the men of the 442nd unit scaled a 4000 foot cliff at the dead of night in order to launch a ambush on the German emplacement known as the Gothic Line.
Men would fall during this climb but none would let out a scream, they just silently plummeted to their deaths, in order to keep their position safe. After getting into position the group laid in wait for dawn to launch their attack. At dawn the attack began and the 442nd won the day and broke the Gothic Line in 34 minutes.