26.Kyiv has largely avoided revealing the full extent of its military casualties, with President Volodymyr Zelensky acknowledging only in February that 31,000 Ukrainian fighters have been killed.Basing its calculations on leaked or published intelligence reports, defense officials, researchers, and open-source intelligence, The Economist wrote that Russia and Ukraine lost a greater share of their population than the U.S. during the Korean and Vietnam wars combined.Almost one in 20 Ukrainian fighting-age men have been killed or injured because of the war, The Economist wrote.In September, the Wall Street Journal provided similar estimates, positing that Ukraine had lost 80,000 soldiers killed and 400,000 wounded. The outlet estimated Russia's losses at up to 200,000 killed and 400,000 injured.The exact figures for both sides are nearly impossible to establish as Kyiv and Moscow are secretive about their casualties.