About 352,000 Russian soldiers had died in the war against Ukraine through the end of 2025, according to a new estimate, underscoring the high cost that President Vladimir V. Putin is willing to bear to pursue his battlefield aims. The figure was released on Saturday — the day of Russia’s annual May 9 parade celebrating victory over Germany in World War II — by the exiled Russian media outlets Meduza and Mediazona. The number raises the prospect that about half a million soldiers in total have died on the Russian and Ukrainian sides. In the more than four years since...