The Ukrainian military unit 'Charter' conducted the 'Veles' operation, advancing 15 km through gas pipelines to infiltrate Russian rear positions in the Kupyansk direction of the Kharkiv region. A commander stated that Russian forces intended to use gas pipelines to penetrate Ukrainian rear lines, prompting the Ukrainian forces to move underground. The operation involved underground advances combined with surface actions, including drone strikes.

The operation resulted in the capture of over 30 Russian soldiers and inflicted over 100 casualties on the Russian army. The unit's commander, Brigadier General Ihor Obolenskyi, commented on the strategy.