In December 1943, the Home Army headquarters sent him to Volhynia, where Ukrainian nationalists had been murdering Polish civilians (see Massacres of Poles in Volhynia and Eastern Galicia). Kiwerski was named chief of staff of Volhynian Home Army. In February 1944, he was named commandant of the Home Army in the province, and commandant of the 27th Home Army Infantry Division.