Fedorov's office sports a huge video screen with dozens of live feeds from Ukrainian drones flying over the front lines. Together, the feeds provide a vivid glimpse into Ukraine's drone war, in which commanders claim flying robots now account for an estimated 70% of all Russian deaths and injuries.

Russia has repeatedly shattered its own records for aerial assaults on Ukraine this summer, culminating in a peak attack on July 9 with the launch of 728 Shahed-type drones. Throughout the war, Russia steadily expanded the reach and intensity of its strikes on Ukrainian cities,

They're cheap, they're deadly and they're among the main reasons Ukraine believes it can hold out against advancing Russian forces this year and even beyond, according to a dozen Ukrainian commanders,