In January 1943, the Bulgarian area was expanded westwards to include all areas west of the Ibar river and south of a line running roughly west from Čačak to the border with occupied Montenegro and the NDH. This released the 7th SS Volunteer Mountain Division "Prinz Eugen", which had been garrisoning this area over the winter, to deploy into the NDH and take part in Case White against the Partisans. Many members of the Volksdeutsche from Serbia and the Banat were serving in the 7th SS Volunteer Mountain Division "Prinz Eugen". This division was responsible for war crimes committed against the peoples of Bosnia and Herzegovina.