In February, the defence secretary said "swarm squadrons" will be deployed by the British armed forces in the coming years.
The US has also been testing interconnected, co-operative drones that are capable of working together to overwhelm adversaries.
Low-cost, intelligent and inspired by swarms of insects, these new machines could revolutionise future conflicts.
From swarming enemy sensors with a deluge of targets, to spreading out over large areas for search-and-rescue missions, they could have a range of uses on and off the battlefield.
But just how different is "swarm" technology from the drones that are currently used by militaries across the globe? The key is self-organisation.
Read the full article and more in BBC News.