Russia’s war in Ukraine was the world’s deadliest conflict in 2025, according to a new report that tracks conflicts globally, despite U.S.-led diplomatic efforts to bring an end to the nearly four-year invasion. The Armed Conflict Location & Event Data Project (ACLED) new Conflict Index reports around 78,000 people killed — including soldiers on both sides and civilians — in Ukraine this year, the highest of any conflict. Because troop casualty figures are state secrets in both Ukraine and Rus