DARPA's Hydra project sounds like the stuff of nightmares of a robot controlled future. The ocean-based network of drones is looking to employ an ocean wide network of autonomous craft to supplement the US Navy.

Program manager Scott Littlefield envisions a network of drones capable of both surveillance and carrying out military action on their own. He said:
"An unmanned technology infrastructure staged below the oceans’ surface could relieve some of that resource strain and expand military capabilities in this increasingly challenging space."
The drones would be able to work with aerial drones and manned vessels and they would be submarine vehicles capable of launching smart weapons from beneath the ocean's surface.

Sounds like all they are missing is the Red Skull.

DARPA, via Gizmag