Winter has arrived. Temperatures in the frontline Ukrainian city of Bakhmut, under remorseless attack from the Russians, plunged to -11C last weekend, and at no point got above freezing. Gradually the mud and rain of late autumn will give way to snow and cold of -20C or lower. Yet both sides have their reasons to carry on fighting.
The weather is a neutral party to the near-10-month war but, in winter, it inevitably acts as a constraint. Simple operations take far longer, cover from foliage is reduced or eliminated, white camouflage is
