Imagine an enemy, fighting the Americans, and they look up and see a swarm of attacking drones! The enemy would be inundated by an innumerable flock of UAVs. From this article it appears that's just what the US Navy has in mind. With seeing huge flocks of birds heading south for the winter this time of year, it's not hard to imagine what a swarm of drones might look like: it would look like the swarm of squidlike robots from The Matrix. Intelligent flying autonomous vehicles would have inter-robot communication network so that it could organize it's own collective configuration and reconfigure in the event of losses. The ememy would really have to watch out for their droppings.