Russia’s increased sense of vulnerability may be the most important result of a recent large-scale Ukrainian drone attack named Operation Spiderweb, experts tell Al Jazeera. The operation destroyed as much as a third of Russia’s strategic bomber fleet on the tarmac of four airfields deep inside Russia on June 1.

Russia launched 58 drones at Ukraine overnight on June 18. Three regions came under attack, according to the Air Forces of the Armed Forces of Ukraine. This night, Russia launched 58 attack drones and decoy UAVs at Ukraine from three directions–Kursk,

Moscow’s drone strikes have grown exponentially thanks in part to a deal with Iran to produce its Shahed drones on Russian soil. An attack overnight that focused on Kyiv killed at least 15.