The Thngs They Carried

From the chapters "Enemies" to "The Dentist" it mostly talks about the Curt Lemon and his death. Curt Lemon's death was caused from a booby trap in VC while playing a game that included tossing smoke grenades with one another. After the loss the best friend, Rat Kiley, goes a little insane. He ends up shooting a baby water buffalo, not to kill, but to torture. From what I think of Rat Kiley's actions, he is probably feeling angry, hurt, and sad from the death of his friend. He must've taken his emotions out on the baby water buffalo and which caused him to shoot it multiple times and leaving it heavily injured.