On The Ground newsletter: Get a weekly dispatch from our international correspondents Get a weekly dispatch from our international correspondents Get a weekly international news dispatch Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. The report said Russia suffered 1.2 million casualties, including up to 325,000 troop deaths, between February 2022 and December 2025. "No major power has suffered anywhere near these numbers of casualties or fatalities in any war since World War II,” the authors said. It estimated that Ukraine, with its smaller army and population, had suffered between 500,000 to 600,000 military casualties, including up to 140,000 deaths. The figures have been described as unreliable by the Russia, as the country’s advance in Ukraine remains in a grinding war of attrition.