Theme of Regret Lieutenant Jimmy Cross was distracted by his thought of Martha when the troop was on a mission. While Lee Strunk was on tunnel duty, Ted Lavender took a restroom break, but was shot and killed when he was walking back. Cross regretted his distraction resulting in Lavender's death, and decided to stop allowing laxity.
Themes of Happening vs. Story Truth and Regret Tim O'Brien told the story of Kiowa's death with Norman as the regretful narrator, but later admits that it was Tim who allowed Kiowa to die and tells the stroy with himself as the narrator. Tim regretted endangering his friend by using a flashlight and not being able save him.
Themes of Story vs. Happening Truth and Regret In the chapter Speaking of Courage, Norman imagines telling his father the story of how he almost earned a Silver Star but didn't because he wasn't brave enough. He regrets his lack of courage causing Kiowa's death.
Theme of Happening vs. Story Truth Curt Lemon triggered a booby-trapped 105 round and was killed when he was blown into pieces that hang from a tree.
Theme of Story vs. Happening Truth Tim also told Curt Lemon's story as he believed Curt must have felt as he died. Curt died from sunlight and was lifted into the tree by the light.