Answer:
Einsatzgruppen
Explanation:
The term that describes the Nazi mobile killing units sent to invade the Soviet Union and kill Jews was Einsatzgruppen.
The Einsatzgruppen were Schutzstaffel death squads of Hitler in Nazi Germany which specialized in killing people in large numbers usually by shooting during the Second World War and were a terror to behold. They were sent into the Soviet Union and also used notably to mass murder the Jews.
