BAKHMUT, Ukraine — The Russian infantrymen slinked back and forth in twos and threes to a house in one of this embattled city's devastated neighborhoods, ferrying ammunition, an automatic grenade launcher and a heavy machine gun ahead of a planned attack.
Hidden in a high-rise, a pair of Ukrainian soldiers watched it all on a feed from the consumer drone they were piloting.
One of the pilots, whose military nickname is Liova, trained the camera on a pair of soldiers next to the house.
