Einsatzgruppe V

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Einsatzgruppe V 
When Hitler invaded Poland in 1939-09, a special Einsatzgruppe was attached to each of the five German armies of the invasion force, with a sixth based in Posen. Einsatzgruppe V was attached to the 3th Army. Each Einsatzgruppe was subdivided into Einsatzkommandos of 100 men. 
The SS : Hitler's Instrument Of Terror / G. Williamson. - St. Paul, 1994. – p. 91 

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