Ukraine Reports 940 Russian Casualties in 24 Hours; Air Defense Downs 148 of 154 Drones; Deep Strikes Hit Saratov Refinery

Ukraine's Ministry of Defense reported 940 Russian personnel losses on March 21, bringing cumulative losses since February 2022 to approximately 1,287,880. Russian forces lost 1,885 UAVs and 30 artillery systems in the same period. Air defense forces shot down 148 of 154 drones deployed overnight against Ukrainian targets. Ukrainian forces struck the Saratov Oil Refinery in a deep-strike operation, with Foreign Minister Sybiha pledging to 'increase the scale of deep strikes on legitimate targets on the territory of the Russian Federation.' Over 161 combat clashes occurred across the front, concentrated in the Huliaipole, Kostiantynivka, and Pokrovsk sectors.