The Air Force is hoping to pit an autonomous drone equipped with an artificial intelligence-driven flight control system against a fighter jet with a human pilot in a little over a year. The service has described this effort in the past as a "big moonshot" that could revolutionize air-to-air combat in ways that have so far been limited to the realm of fiction - at least as far as we know.
At its most basic, a UCAV would be able to perform many of the same functions as manned aircraft, but would be able to make key decisions faster and more accurately, taking into account much more information in a shorter period of time, without any concern about being distracted or confused by the general chaos of combat. They can also be networked into swarms that work cooperatively to maximize their combat effectiveness at any given time far beyond what a human-piloted formation could.
See the full story here: https://www.thedrive.com/the-war-zone/33866/manned-fighter-to-face-an-autonomous-drone-next-year-in-a-sci-fi-movie-like-showdown