What is POLITICO Pro? Policy areas Our Pro coverage Request a demo Contact us KYIV — As Russia probes Ukraine’s defensive lines ahead of an expected offensive, it might have lost the entire elite 155th naval infantry brigade while storming Vuhledar, a coal-mining town in the Donetsk region.  The Institute for the Study of War reported that recent footage of failed Russian assaults near Vuhledar has pushed some Russian military bloggers to call for public trials against the high-ranking officers as they continue to repeat the same mistakes. Ukrainians are not rushing to celebrate victory, though, as Russian forces continue to storm Ukrainian positions near Vuhledar, Avdiivka and Bakhmut, where Ukrainians are preparing for street fighting