This mass grave of murdered Jews was the handiwork of an Einsatzgruppen der Sicherheitspolizei, a group of SS whose sole purpose was the extermination of Jews and other "undesirables". Overseen by Reinhardt Heydrich, the four Einsatzgruppen were comprised of units of Einsatzkommandos which traveled with the Wermacht in order to "purify" newly conquered territories. Each group contained 500 to 800 men. It is estimated that they were responsible for over one million deaths.
Affidavit signed by Rudolf Hoess, former commandant of Auschwitz, attesting to the gassing of Jews at the killing center during his tenure. The text reads: "I declare herewith under oath that in the years 1941 to 1943 during my tenure in office as commandant of Auschwitz Concentration Camp 2 million Jews were put to death by gassing and a 1/2 million by other means. Rudolf Hoess. May 14, 1946."
On 2 July 1942, most of the children of Lidice, a small village in what was then Czechoslovakia, were handed over to the Łódź Gestapo office. Those 82 children were then transported to the extermination camp at Chełmno 70 kilometers away. There they were gassed to death. This remarkable sculpture by by Marie Uchytilová commemorates them.