A thousand snipers in the sky

The 108th Separate Battalion ‘Da Vinci Wolves’ of Ukraine training with unmanned land drones in the Donbas region, Ukraine. — Tyler Hicks/The New York Times

WHEN a mortar round exploded on their American-made Bradley infantry fighting vehicle, Ukrainian soldiers inside were shaken but not overly concerned, having endured years of artillery barrages.

But then the drones came.