Batman Begins
Bruce Wayne’s parents are killed and it’s alluded to the fact that corruption had to do with it. He watched the news and heard about the Grey Ghost which inspired his crime-fighting crusade.
Batman goes off to train with the League of Assassins to become a crime-fighting vigilante.
Bruce trains alongside Bronze Tiger, Ubu, and Talia Al Ghul in disguise.
This team was sent off on a mission to kill an old man and they were able to do that later it was revealed that the old man was Ras Al Ghul.
The final ceremony was pinning Batman against bronze Tiger and Ubu against Talia, in fights to the death. Ubu seemingly killed Tallia but they will revive her with the Lazarus pit, secretly. Batman had the chance to kill Bronze Tiger, but then showed mercy and escaped.
Ras Al Ghul was revealed to have survived being killed with the help of the Lazarus Pit, and his daughter ends up surviving in secret as well. Ubu is promoted and Bronze Tiger has a job to finish.
Bruce returns to Gotham and tells Alfred everything that he intends on doing.