For "In the Field" whats is the role of in this story? Guilt? Are their feeling justified?

Guilt definitely comes into play, but this section addresses blame and responsibility in a much bigger way than that of guilt. Cross may actually feel guilty, but he refuses that responsibility when he lays guilt elsewhere. O'Brien blames Cross for Kiowa's death, although he only holds him partially responsible..... none-the-less, we're back to looking at blame. It's hard to accept responsibility in war because there are so many things that cannot be controlled. In my opinion, Cross' refusal to accept responsibility doesn't necessarily mean he wasn't guilt ridden. Thus, both of these things can be considered "roles" of the story.