Ukrainian Forces Go 15 Km Underground in One of the War's Most Unusual Assault Operations

Ukrainian troops infiltrated the rear of Russian forces near Kupiansk in Kharkiv Oblast on October 22, 2026, after moving about 15 kilometers through underground gas pipelines. The operation, codenamed "Veles," involved combining the underground advance with surface operations, including drone strikes, and reportedly resulted in over 100 Russian casualties and 30 captured.