"Einsatzgruppe" A had already murdered almost all Jews in its area, so it shifted its operations into Belarus to assist "Einsatzgruppe" B. In Dnepropetrovsk in February 1942, "Einsatzgruppe" D reduced the city's Jewish population from 30,000 to 702 over the course of four days. The German Order Police and local collaborators provided the extra manpower needed to perform all the shootings. Haberer wrote that, as in the Baltic states, the Germans could not have killed so many Jews so quickly without local help. He points out that the ratio of Order Police to auxiliaries was 1 to 10 in both Ukraine and Belarus. In rural areas the proportion was 1 to 20. This meant that most Ukrainian and Belarusian Jews were killed by fellow Ukrainians and Belarusians commanded by German officers rather than by Germans.