They soon reached Ukraine and had reached Kiev by late August. In September, Rudniev formed a partisan group in Putyvl. In October, Rudniev and Sydir Kovpak's partisan detachment united into one unit, with Rudniev becoming commissar.
Shortly after arriving in Ukraine, they reached Kiev by late August. By September, Rudniev created a partisan group in Putyvl. In October, Rudniev combined his partisan detachment with Sydir Kovpak's unit into one force, with Rudniev taking on the role of commissar.