The Army and Swarming Drones

Expect the use of multiple drones that work together to achieve results to comtine to increase.   And Military is an obvious application.  Note the use of (HRL) Hierarchical Reinforcement Learning) as being tested,will take a look at the details of that.

Army Advances Learning Capabilities of Drone Swarms   By U.S. Army Research Laboratory

U.S. Army Combat Capabilities Development Command Army Research Laboratory researchers, working with colleagues a North Carolina State and Oklahoma State universities, have developed a reinforcement learning technique to guide swarms of unmanned drones on missions.

Researchers at the U.S. Army Combat Capabilities Development Command's Army Research Laboratory (ARL) and North Carolina State and Oklahoma State universities developed a reinforcement learning technique to enable swarms of unmanned drones to carry out missions while minimizing performance uncertainty.

The Hierarchical Reinforcement Learning (HRL) approach breaks down a global control objective into hierarchies, including multiple small group-level microscopic control and broad swarm-level macroscopic control.

Each hierarchy exhibits a unique learning loop with its own local and global reward functions, and running these loops in parallel significantly compresses learning time.

Compared to centralized reinforcement learning, HRL shortened learning time by the swarm by 80%, and limited loss of optimality (the point at which the difference between benefits and costs is maximized) to 5%.

From U.S. Army Research Laboratory
More at the link.