Richard Pendlebury goes inside a Ukrainian T-80 tank on the Sumy frontline

Deep in the forests of northern Ukraine, a deadly duel unfolds between old steel and modern drones. The Frontline team meets Ukraine's elite Kraken Regiment as they battle a new Russian incursion near Sumy, the closest front to Kyiv. Amid shellfire and drone hunts, one Ukrainian tank crew becomes the last line holding the forest. This is their story and the story of the technology reshaping modern war.