From mid-May 1942, the regiment was reunited under Colonel Markulj, after which the 100th Jäger Division joined in the final phases of the pincer attack on the Red Army bridgehead at Kharkov. In June, the division supported the 1st Panzer Army's drive along the Don River, through Voronezh to Kalach where the regiment incurred heavy casualties trying to cross the river in the face of serious resistance.