They regrouped northeast of Warsaw in German-occupied Poland, under the command of SS-Obersturmbannführer Hans Siegling who was also the SS and police leader of Generalbezirk Weissruthenien.

It consisted of men from the German-occupied territories of the Soviet Union, mainly from Belarus, including whole local military headquarters (Kommandantura) of Belarusian Home Defence and members of Andrey Vlasov's Russian Liberation Army, but also units of the German Sicherheitspolizei (SiPo), Sicherheitsdienst (SD), and Ordnungsdienst from the area.

[1] By November 1944, the battalion whose formation started in August originally – as the Schuma Brigade Siegling – was transported to France as the 30th Waffen Grenadier Division of the SS (2nd Russian).

They gradually retreated west from the GK Weißruthenien (as it was called then) toward occupied eastern Poland between June 22 and August 19.

At the end of June 1944, the SS commander Curt von Gottberg issued an order to create the Schutzmannschaft-Brigade Siegling which by July 20 was formed and prepared for duty.

The approximate number of the personnel is estimated as follows: up to 6 thousand auxiliary Ordnungspolizei, 2,000 SD men, and up to 8,000 members of the BKA.

The Division was composed of the following regiments: The combat-ready units of the Brigade Siegling were transferred to France to participate in operations against the French Resistance.

[1] Siegling led dozens of Nazi security warfare operations in Belarus since 1941 as the commander of the 57th Auxiliary Police Battalion.