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Ender receives his surgery to finally get his monitor removed at the age of 6, 3 years longer than the other children keep theirs for.
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After class, Stilson, a bully, confronts Ender about his monitor. Seeing that Stilson brought a gang, Ender quickly beats him up and walks away.
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After Ender beats up Stilson, Colonel Graff shows up at Ender's house to recruit him for Battle School. Ender agrees, and the next day he leaves on the shuttle for the school.
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After just moments of sitting on the ship, Bernard starts hitting Ender for being a Third. Ender swiftly throws him against the wall of the shuttle, breaking Bernard's arm.
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After some time with his group of Launchies, Ender gets promoted to Salamander Army with kids almost twice his age.
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Teaching them what he learns, Ender holds evening training sessions with the Launchies to help them advance their skills.
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Bonzo hates Ender so much that he feels that he has to get rid of him at all costs. Ender is traded to Rat Army.
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After spending some time in Rat Army, Ender gets advanced to Phoenix Army for more training.
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Knowing that Ender feels depressed and lonely, Valentine sends Ender a letter for encouragement. It is hard for Ender to make and keep friends with how fast he is advancing.
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After the school sees that Ender is excelling, the teachers decide to make him the commander of Dragon Army
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Ender is winning every battle, which makes Bonzo mad. Bonzo attempts to fight Ender in the bathroom, but Ender kills him in the fight.
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After winning his final battle in Battle School, Ender graduates and receives orders to attend Command School.
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Before starting Command School, Ender is given a vacation by the I.F. Valentine comes to visit him and convinces him that he needs to continue his training.
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Ender takes a tug ship with Graff to Eros. He learns about how the buggers communicate and that multiple ships are invading their home right now.
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In a seemingly impossible battle, Ender goes through a "simulation" with all of his old friends with the adults watching. He wins the battle by blowing up a bugger planet. Ender is then told that all of the simulations were actually real battles and that he has won the war against the buggers at just 11 years old.