One of the bigger things that happened in 2020 was that two countries - Azerbaijan and Armenia - fought a war. The war lasted for about 6 weeks, and it has set the air defense world ablaze. 

For the first time, the world got to see a national army bring a fleet of armed drones to the battlefield. And the impact those drones have made was huge. 

Using a swarm of cheap Turkish drones and Israeli loitering munitions, Azerbaijan swept aside Armenia's air defenses and paved a road to victory. 

Cheap armed drone technologies are spreading like wildfire across the world. In this video, I want to look at how such drones add new wrinkles, opportunities and challenges to modern warfare.