Ukrainian troops have made a tactical retreat from three more villages as Russian forces press forward across the eastern front line and take advantage of Kyiv’s exhausted military, which is desperately awaiting the arrival of new U.S. assistance. Ukraine’s commander in chief, Col. Gen. Oleksandr Syrskyi, said in a Telegram post Sunday that the “situation at the front has worsened” and described some of the toughest fighting west of Avdiivka, the city that fell to Russian forces in February. In that direction, Ukrainian troops withdrew from the villages of Berdychi, Semenivka and Novomykhailivka. “Trying to seize the strategic initiative and...