After being encircled by Ukrainian forces, Russia pulled troops out Saturday from an eastern Ukrainian city that it had been using as a front-line hub. It was the latest victory for the Ukrainian counteroffensive that has humiliated and angered the Kremlin…Russia’s withdrawal from Lyman complicates its internationally vilified declaration just a day earlier that it had annexed four regions of Ukraine — an area that includes Lyman. Taking the city paves the way for Ukrainian troops to potentially push further into land that Moscow now illegally claims as its own.