Bane was born in the fictional Caribbean Republic of Santa Prisca, in a prison called Pena Dura (“Hard Rock”). When his father escaped from prison, the boy was forced to serve out his father’s life sentence, and thus Bane’s childhood and early adult life are spent in the amoral penitentiary environment. Though imprisoned, he’s eager to develop his natural abilities, reads as many books as he can get his hands on, builds up his body in the prison’s gym, and learns to fight in the merciless school of prison life. Bane ultimately establishes himself as the “king” of Pena Duro prison.
The prison’s controllers take note and eventually force him to become a test subject for a mysterious drug known as Venom, which had killed all other subjects. It nearly kills him at first, but he survives and finds the drug vastly increases his physical strength, although he needs to take it every 12 hours (via a system of tubes pumped directly into his brain) or he would suffer debilitating side-effects.
Years later, Bane escapes Pena Duro. His ambition turns to destroying Batman, whom he had heard tales of while serving his sentence. He is fascinated with Gotham City because, like the prison, it is a place where fear rules: in this case, fear of Batman. Bane is convinced that the demonic bat that haunted his dreams since childhood is a representation of the Batman.
Actor Tom Hardy got the role as Bane. You may remember his performance in the movie Bronson: