“Johnny Get Your Gun” is an old song that became particularly popular during World War I. The title of the book—
Johnny Got His Gun—differs from the song, with the novel’s past-tense title suggesting that it focuses not on the hopeful feelings at the beginning of a war but instead on the aftermath. This passage shows how people justified going to war as a patriotic duty. But this hopeful beginning to Joe’s journey quickly fades once he realizes that he’s missing both his arms.