Ukraine marked its most significant territorial recovery in years, with Russian troops experiencing a net reduction of 69 square miles in the four weeks leading up to May 19, based on ISW data. Over the past week alone, Russia lost 29 square miles. In April 2026, there were 21 Ukrainian attacks on Russian oil facilities, which drove refinery production down to a 16-year low and brought Russian crude processing to approximately 18 percent below 2021 figures.
