During the summer months, the battalion took part in joint actions with the 1st SS Infantry Brigade of the Waffen-SS, both providing support and undertaking independent killings. The brigade's report of 19 August to the Command Staff Reichsführer-SS (SS operational staff set up for the invasion) noted that the battalion executed 25 Jews and 16 Ukrainians. It also referred to the unit's killing of 322 Jews in the town of Slavuta.