Bartov also wrote that German film-makers liked to show the heroic last stand of the 6th Army at Stalingrad, but none has so far showed the 6th Army's massive co-operation with the "Einsatzgruppen" in murdering Soviet Jews in 1941 during its march across the Ukraine. Likewise, Bartov commented that German films tended to dwell on the suffering of the 6th Army during the Battle of Stalingrad and its aftermath without reflecting on the fact that it was the Germans who invaded the Soviet Union and that the Russians were fighting to defend their country.