After nearly four years, the grinding war between Russia and Ukraine is approaching a staggering battlefield toll: nearly half a million dead and 1½ million wounded or missing across both sides.

A new report warned that the number of soldiers killed, injured or missing on both sides of Russia's war on Ukraine could hit 2 million by the spring, with Russia suffering the largest number of troop...

"Despite claims of battlefield momentum in Ukraine, the data shows that Russia is paying an extraordinary price for minimal gains and is in decline as a major power," the report said.