X-Men Origins: Wolverine

In 1845, James Howlett, a boy living in Canada, witnesses his father being killed by groundskeeper Thomas Logan. Anxiety activates the boy's mutation: bone claws protrude from his knuckles and he impales Thomas, who reveals that he is James' birth father before dying. James flees along with Thomas' other son Victor Creed, who is James' half-brother and has a sharp claw-nails and healing factor mutation like James. They spend the next century as soldiers, fighting in the American Civil War, both World Wars and the Vietnam War in 1973. In Vietnam, the increasingly violent Victor attempts to rape a Vietnamese woman and kills a senior officer who tries to stop him. James returns to Victor upon the commotion, and ignorant of his brother’s intent, he rushes to defend him. This results in the pair being sentenced to execution by firing squad, which they survive due to their mutant healing abilities. Major William Stryker approaches them in military custody and offers them membership in Team X, a group of mutants including expert marksman Agent Zero, katana-wielding mercenary Wade Wilson, teleporter John Wraith, super-strong and invulnerable Fred Dukes and technopath Chris Bradley. They join the team for a few missions, with James using the alias Logan, but Victor and the group's lack of self-control and empathy for human life causes Logan to leave.