In a frozen landscape on the city"s north-eastern edge, 21-year-old Lieutenant Yevgen Gromadsky stands with hands outstretched. There are trenches dug in nearby. "Outgoing," he says, lifting his right hand to accompany the thump of fire from his positions. "Incoming," he says, and his left hand ticks up. With a crump, Russian shells are fired from their positions 900m away across snow-covered fields.