"The Punisher is a vigilante who considers killing, kidnapping, extortion, coercion, threats of violence, and torture to be acceptable crime-fighting tactics. Driven by the deaths of his family, who were killed by the mob when they witnessed a gangland execution in New York City's Central Park, the Punisher wages a one-man war on the mob and all criminals in general by using all manner of conventional war weaponry. His family's killers were the first to be slain. A war veteran, Castle is a master of martial arts, stealth tactics, guerrilla warfare and a wide variety of weapons.
Source: Wikipedia, "The_punisher", available under the CC-BY-SA License.