The Question and Answer section for The Things They Carried is a great resource to ask questions, find answers, and discuss the novel.
The sentence structure is simple. O'Brien seems to use repetition of specific words to create mood and effect. The diction is also simple but with war terminology like "booby traps" and acronyms like SOP. His style is conversational and narrative....
I think you need more than a sentence to go into this much detail.
O'Brien was deeply affected by the man's death, the future he no longer had, and the wedding ring on his hand.... the family he would no longer return to.