A 4-year Vietnam veteran, Frank Castle became the vigilante known as the Punisher after seeing his wife and children gunned down for accidentally observing a Mafia "hit". Since then, he has devoted his life to the task of destroying organized crime wherever he finds it. Although he aids many heroes in their quests, they often come into conflict over his way of dealing with crime.
The Punisher differs from the majority of vigilantes. The Punisher works outside the traditional system of law and order. He is cold-blooded when comes to killing criminals, but he cares about the lives of innocent civilians. He possesses no superhuman abilities and succeeds solely through ingenuity and the rigorous training of his military upbringing, a finely honed killer instinct and an extensive arsenal of weapons culled from fallen foes and military allies.