 Complete the following phrase:  Serbian collaborationist organizations the Serbian State Guard SDS and the Serbian Border Guard SGS reached a combined peak size of 21,000 men, the Serbian Volunteers Corps SDK, the party militia of the fascist Yugoslav National Movement Zbor lead by Dimitrije Ljotić reached 9,886 men, its members helped guard and run concentration camps, and fought the Yugoslav Partisans and the Chetniks alongside the Germans. In October 1941, the Serbian Volunteer Corps participated in the 