Hungary was the fourth nation to join the Axis, signing the Tripartite Pact on 27 September 1940. The plan also included the kidnapping of children deemed to have Aryan- Nordic traits, who were presumed to be of German descent. Catholic schools were required to reduce religious instruction and crucifixes were removed from state buildings. Heinrich Himmler: The Sinister Life of the Head of the SS and Gestapo. Of these, they killed an estimated.3 million, with.8 million of them being killed between June 1941 and January 1942. Genocide Studies and Prevention: An International Journal.