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. Advertisement AdvertisementAdvertisement AdvertisementIt 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. “We will respond fairly to Russia for this and other similar attacks.”Several buildings sustained damage in the attacks on Odesa, though no casualties were reported.