The content originally appeared on: CNN Bakhmut, Ukraine (CNN)In the ruins of an apartment block tarred with soot and clouded in dust amid constant shelling, a small group of Ukrainian soldiers are face to face with a new type of Russian enemy: mercenaries, some of whom may be convicts sent to the front line. The battle is as heated as it is crucial around the city of Bakhmut. Russian positions are within 200 meters of the Ukrainian military unit that […]