AI can’t do everything humans can do, but any responsibilities that both are capable of handling will be assumed, almost completely, by robots. There’s pretty much no way around that. From a Popular Science report by Kelsey D. Atherton about the proposed robotization of the U.S. military:

“By the middle of this century, U.S. Army soldiers may well be fighting alongside robotic squadmates. General Robert Cone revealed the news at an Army Aviation symposium last week, noting that the Army is considering reducing the size of a Brigade Combat Team from 4,000 soldiers to 3,000, with robots and drones making up for the lost firepower. Cone is in charge of U.S. Army Training and Doctrine Command (TRADOC), the part of the Army responsible for future planning and organization. If the Army can still be as effective with fewer people to a unit, TRADOC will figure out what technology is needed to make that happen.

While not explicitly stated, a major motivation behind replacing humans with robots is that humans are expensive. Training, feeding, and supplying them while at war is pricey, and after the soldiers leave the service, there’s a lifetime of medical care to cover. In 2012, benefits for serving and retired members of the military comprised one-quarter of the Pentagon’s budget request.”