An arsenal of millions of autonomous drones is a credible threat to a mechanized assault or a flotilla of ships. A state-of-the-art drone swarm could halt a Russian invasion or a Chinese blockade. Ukraine has proven this by blunting large-scale Russian mechanized attacks and crippling Russia’s Black Sea fleet. Kyiv’s expert use of drones is the reason it has been able to launch a surprise offensive deep into the Russian region of Kursk.