In the same period, the destruction of the Jews became the most important goal.[7] In the spring of 1943, Sonderaktion 1005 was in full operation, the exhumation and incineration of those murdered by the Einsatzgruppen across the whole Eastern Front, whose death toll had so far reached 1.8 million Jews. Himmler ordered the liquidation of all Jewish ghettos in German occupied Poland on 11 June, and all Soviet ones on 21 June. As of 25 June, four new crematoria and gas chamber installations were completed in Auschwitz-II Birkenau at Auschwitz concentration camp.