Tayo is sick in bed, trying not to think that he is stuck in a jungle in the Pacific Island but he doesn't remember shooting a bunch of Japanese soldiers.Doctors say that he might be suffering from a "battle fatigue" or as what we call it a "PTSD".
"PTSD" is caused by the deaths of those soldiers in which he cared about. If he had a loved one in that war; he was affected by his/her death.
Yeah, he did. He lost a father figure in that war. His name was Josiah.