So It Goes

One of the clear repetitions in the novel is the small statement of "so it goes," at any given point in the book. Yet, this simple often used sentence only appears when the subject of someones death arises. Vonnegut's use of repetition in the book enforces how often and unchangeable death is in a situation of war, or times of peace.

"It killed everybody on the gun crew but Weary. So it goes," (p. 35)
"...his wife died accidentally of carbon-monoxide poisoning. So it goes," (p. 25)

Having said earlier in the book, that the narrator had difficulty finding words to describe what he had seen in the war, it can be assumed that includes death. So many people were dying in an almost constant rate. With that much death surrounding someone, it becomes almost normal, a simple thing, "so it goes," in the everyday routine. What other aspects if war did the soldiers become numb to?