 Complete the following phrase:  In mid-1944, during the Operation Bagration, Dirlewangers unit suffered heavy losses during fighting against Red Army regulars. It was then hastily rebuilt and reformed into a storm brigade and used in the suppression of the Warsaw Uprising. Historian Martin Windrow wrote that in the summer of 1944 Dirlewanger led his butchers, rapists and looters into action against the Warsaw Uprising, and quickly committed ... unspeakable crimes. In Warsaw, Dirlewanger participated in the 