The bravest thing I ever heard about had nothing to do with killing the enemy, charging forward or anything like that. It was a Royal Navy sailor in WW2 on the Atlantic Convoys, where my late father in law served. As you may know, convoys sailed quickly and in formation to avoid as much as possible torpedo attack. When a ship went down, the men in the water were often on their own. To stop or turn a ship for a rescue would be to invite its own destruction. On this occasion as ship sailed pass some survivors in the sea, men who knew no one could stop to pick them up, one man in the water with his arm held up was heard shouting 'TAXI, TAXI'.