At the time of the discovery of an extragalactic "planet killer" in 2267, Kirk theorized that the robot weapon was, in fact, that: "a doomsday machine that somebody used in a war uncounted years ago. They don't exist anymore, but the machine is still destroying." The misinformed and paranoid Klingon commander Kruge believed that Project Genesis was the Federation's attempt at creating an ultimate weapon, and described the Genesis Device as a doomsday weapon. (Star Trek III: The Search for Spock)