(Reuters) – Russian forces are pounding Ukrainian positions with artillery fire and in the eastern region alone launched almost 400 strikes on Sunday, President Volodymyr Zelenskiy said in a video address. Russia withdrew its forces from the southern city of Kherson this month and moved some of them to reinforce positions in the eastern Donetsk and Luhansk regions, an industrial area known as the Donbas. “The fiercest battles, as before, are in the Donetsk region. Although there were fewer attacks today due to worsening weather, the amount of Russian shelling unfortunately remains extremely hi…