Russia's military has been preparing for a drone-filled battlefield, and even its cooks are being trained to shoot them down

• The spread of drones on the battlefield in Ukraine is one of the most notable features of the war.
• Russia's military has been experimenting with drones in a variety of combat roles for years.
• Counter-drone training has also become common throughout the Russian military.

Russia's attack on Ukraine last year kicked off Europe's biggest conflict since World War II, one in which two modern militaries have deployed new weaponry at an unprecedented scale.

As such, the fighting in Ukraine has introduced the world to new technologies that are upending longstanding military thinking. Perhaps the most notable development is the widespread use of drones.