sentences:  The German army, the Wehrmacht, was accompanied by seven SS Einsatzgruppen ("special task forces") and an Einsatzkommando, numbering altogether 3,000 men, whose role was to deal with "all anti-German elements in hostile country behind the troops in combat".Most of the Einsatzgruppen commanders were professionals; 15 of the 25 leaders had PhDs.By 29 August, two days before the invasion, they had already drawn up a list of 30,000 people to send to concentration camps.