Sea Hunter
You can get more context from its official name, Anti-Submarine Warfare Continuous Trail Unmanned Vessel or ACTUV. It seems National Defenses are keener on quiet submarines which lurk near the shore. Sea Hunter is a quiet, autonomous anti-submarine ship that fills in that void. It was launched in 2016, and it is under the DARPA ACTUV program. Vigor Industrial built the vessel, which is part of a line of experimental ships.
Gladiator TUGV
This modified bomb disposal machine was specifically developed for the Marine Corps. The Gladiator has higher maneuverability, better speed, and a longer range than anything that has come before it. Aside from that, it is armored to withstand small arms fire, and it is among the first combat drones in service right now. Also, it has a multi-mission remote battle station that can use anti-personnel and anti-vehicle weapons. In addition, it can mount sensors for reconnaissance and supplies for forwarding troops.