How did J.D. Salinger’s experience in World War II influence his writing?

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J.D. Salinger’s experience in the U.S. Army during World War II influenced many elements in his short stories. For example, “For Esmé—with Love and Squalor” (1950) describes a U.S. soldier’s poignant encounter with two British children. “A Perfect Day for Bananafish” (1948) concerns the suicide of the sensitive, despairing veteran Seymour Glass.