A Ukrainian drone attack ignited a fire at a Russian oil depot in Smolensk, deep within Russian territory. This incident on December 31 highlights Ukraine's ongoing strategy to undermine Russian oil production, which funds the war. The fire follows a series of Ukrainian drone strikes on Russian oil assets, disrupting their operations. The attack occurred after authorization for Ukraine to employ long-range weaponry against Russia. Despite Russian claims of downing numerous Ukrainian drones, including 10 in the Smolensk region, the drone debris caused significant damage. The impact on Russia's oil production and war effort is yet to be fully determined.