Ukraine war latest: Ukraine hits ballistic missile propellant plant in Rostov Oblast; North Korean troops endure heavy losses
Key developments on Dec. 26: * Ukraine hits ballistic missile propellant plant in Rostov Oblast, Stratcom reports * North Korean troops in Kursk Oblast endure heavy losses, logistical struggles, Ukrainian military intelligence says * 18 Russian soldiers allegedly killed in Ukraine's Dec. 25 attack in Kursk Oblast, military says * 'Increase in enemy activity'