"Comrades-in-Arms" is internally connected with the works about the Great Patriotic War that Simonov wrote later. The reader first becomes acquainted in the novel "Comrades-in-Arms" with some of the characters from the trilogy "The Living and the Dead" and the novel "The So-Called Private Life (From Lopatin’s Notes)," while the fighter pilot Polynin became the hero of the novella "The Incident with Polynin," included in this book, whose action takes place in the autumn and winter of 1941.