Some get lucky (Audie Murphy), but most die in the attempt at bravery. One fella, Sgt. York, actually outsmarted a group of Germans running at him by picking off the LAST guy running at him all the way up to just about the last one and overcame a group that way, but that is the exception to the rule. When one bad guy or group of guys goes on a rampage, the police/military show up with huge numbers. When the police/military are faced with similar numbers, the story doesn't end near as well. It's numbers.
Luke 14:31 "Or what king, when he sets out to meet another king in battle, will not first sit down and take counsel whether he is strong enough with ten thousand men to encounter the one coming against him with twenty thousand?
Luke 14:32 "Or else, while the other is still far away, he sends a delegation and asks terms of peace.
War is entirely different. Large numbers of men fire guns, mortar shells, and artillery rounds in the general direction of the enemy.