What changes if Douglas MacArthur retires in the United States before World War II?
Short answerA less political general runs the Southwest Pacific, while Nimitz gains far more authority and might become supreme commander for the entire Pacific theater.
NotesA replacement land commander would probably exercise less political dominance than MacArthur. Nimitz would then have greater leverage because his strategy was more coherent and his naval command already attracted broad support. MacArthur's political skill allowed him to preserve a separate centre of power. Without him, Nimitz might command the whole Pacific, including the Southwest Pacific and Southeast Asian operations.