In early July 1941, Sandberger was sent to Estonia on the orders of Stahlecker. According to Sandberger's later testimony, Stahlecker made it clear that Sandberger was being sent to Estonia to carry out the Führer order in that country. A variety of shooting actions of Jews, Gypsies, Communists and the mentally-ill began once Sandberger and his kommando entered Estonia. A report dated 15 October 1941 on executions in Ostland during Sandberger's tenure included one item under Estonia of 474 Jews and 684 Communists.