A Kalashnikov rifle slung over his shoulder, Voznesensk’s funeral director, Mykhailo Sokurenko, spent this Tuesday driving through fields and forests, picking up dead Russian soldiers and taking them to a freezer railway car piled with Russian bodies—the casualties of one of the most comprehensive routs President Vladimir Putin’s forces have suffered since he ordered the invasion of Ukraine. ... Russian survivors of the Voznesensk battle left behind nearly 30 of their 43 tanks, infantry fighting vehicles, multiple-rocket launchers and trucks, as well as a downed Mi-24 attack helicopter, according to Ukrainian officials in the city. The helicopter’s remnants and some...