We often think of unmanned aerial vehicles (sometimes called UAVs, or more frequently “drones”) as a relatively new innovation. But from the radioplanes of World War II to the submarine-launched drones of the 1990s, visions of militarized robots have been with us for over a century now.
Ron Miller over at io9 has the story of the Kettering Bug, a drone first developed for use in World War I.
https://gizmodo.com/the-first-drones-used-in-world-war-i-453365075
