B-21 Raider
If we had not included the B-21 Raider, this list would have been incomplete. The Air Force was interested in a modernized version of the Long-Range Strike Bomber, thus Northrup Grumman developed the B-21 Raider in response to their request. Despite the fact that it will be a manned aircraft, its attraction lies in the fact that it can also function as a high-altitude stealth drone bomber. Due to the fact that it will be deploying nuclear payloads, it will still require a pilot to man the controls.
B-21 Raider
BigDog Military Robot
Boston Dynamics, the company that developed the BigDog military robot, is now a subsidiary of Google. This was constructed as a force multiplier. It will be able to traverse all terrains without collapsing or losing its balance. This is perfect for use in arid environments such as deserts, sand, snow, and forests. It can be used to carry supplies to soldiers in areas where helicopters are unable to reach.
BigDog Military Robot