"The SS : Hitler's Instrument Of Terror / G. Williamson. - St. Paul, 1994. – p. 91"@en . "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."@en . . "Einsatzgruppe V"@en . .