A massive drone attack walloped the military command center Russia is using to wage its war against Ukraine on Saturday. The overnight barrage destroyed ammunition plants and fuel depots in Russia’s Belgorod, Kursk, and Rostov regions. Among the successful targets was the Morozovsk airfield, where Russia keeps its fighter-bomber jets. The Russian airfield has played a crucial role in the Kremlin’s operations against Ukraine. Some of Russia’s anti-aircraft defense systems were also disabled on Saturday by Ukrainian-launched missiles. Russia also lost its B-237 Rostov-on-Don attack submarine, which was sunk Saturday outside Sevastopol in Ukrainian bomb strikes. Ukraine’s Ministry of Defense...