The narrator recognizes that war is cruel, unjust, and inescapable.
The narrator claims that leaving a war would only result in the war attacking your house once you returned. During World War I, Earnest Hemingway worked for the Red Cross and sustained injuries from Austrian mortar fire while performing his responsibilities.
He covered subsequent wars in Europe after World War I as a war journalist. Hemingway "told the public about every aspect of the war, notably, and most significantly, its impact on the average man, woman, and child," according to his grandson, who was speaking about his reporting on the conflict.
In a similar vein, Hemingway's novel Farewell to Arms dealt with the reality of war rather than celebrating it. That kind of tone is also conveyed by the narrator in the section that is being used here.
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