Ambush/The Man I Killed

 The Man I Killed is written in the first person point as Tim O'Brien is standing next to the dead boy. Tim knows myriads of intimate details about the man he killed because the dead man was the first man he killed in war. Usually, when someone does something for the first time, they put more time into it and examine their work carefully. Tim feels remorse about the boy and that if he hadn't killed him, the boy would've had a bright future ahead of him. When Tim O'Brien is talking about the boy's future, he explains a whole lot about how he might have been a math teacher and other very personal details. This, I believe, is from Tim's own life as too much personal information about the boy is said. Maybe he was the one who wanted to be a math teacher and have a wonderful life with a girl next to the motorcycle.