From a Wall Street Journal story by Yaroslav Trofimov headlined “Drones Everywhere: How the Technological Revolution on Ukraine Battlefields Is Reshaping Modern Warfare”:

CHASIV YAR, Ukraine—Wearing video goggles, a Ukrainian trooper crouched on the top floor of a gutted high-rise and piloted a small drone into the nearby Russian-occupied city of Bakhmut.

With a swoosh, the first-person-view drone—which cost roughly $300 to assemble—sped after a target of opportunity, blowing up a pickup truck full of Russian troops.