Dude, Not Funny!: Azar poking fun at Kiowa's death, making comments about "eating shit" and the like, although after he sees the horrible state the body is in, he personally apologizes to the rest of the platoon.
Nightmare Fuel: Some of the descriptions of injuries can get this far.
Squick: Kiowa's death, being drowned in a mixture of mud and shit as multiple other characters dive in to attempt to find or save him themselves.
The Woobie: Normal Bowker after the war. He becomes a Shell-Shocked Veteran and is simply unable to adjust to normal life, admitting to O'Brien that part of him died in the shit fields. He later hangs himself, although O'Brien (the author) later admits that that never happened.