Ukraine deployed 11 drones carrying 100 kg warheads to destroy the Sever-Akhmat regiment's drone training compound in Russian-occupied Snizhne on 20-21 May, killing 65 cadets and one instructor. Russia answered with two nuclear-capable IRBMs and 688 other weapons aimed at a capital city.
The Sever-Akhmat regiment is a Chechen-affiliated unit that has used drone operators as a force-multiplier in Donetsk. Destroying the training pipeline at compound level is a different class of targeting from battlefield drone interdiction.
Russia cited the follow-up Starobilsk strike, not the Snizhne operation, as its formal justification for the barrage. The distinction matters: Starobilsk sits in Luhansk Oblast, which Russia claims as its own territory under annexation. Strikes on annexed land carry different rhetorical weight in Moscow than strikes on occupied Donetsk.
The Snizhne operation followed Ukraine's Syzran refinery strike , which halted roughly 25% of Russian refining; together they put simultaneous pressure on both Russian military training and fuel supply.
