BAKHMUT, Ukraine—Ukrainian artillery fire mangled the platoon of Russian soldiers advancing on this besieged city. Guided by a live video feed from an aerial drone, the guns cut down the first group of 20, a reconnaissance officer recalled. Then a further group of 20 were knocked out, followed by 10 more.
Later that same day in January, another 20 Russian soldiers trudged forward along the same path and managed to dig in at a new position in a wood a little closer to Bakhmut.