When military action turned out not to be necessary due to the Munich Agreement, the Einsatzgruppen were assigned to confiscate government papers and police documents. They also secured government buildings, questioned senior civil servants, and arrested as many as 10,000 Czech communists and German citizens.[5][6] From September 1939, the Reichssicherheitshauptamt (Reich Main Security Office; RSHA) had overall command of the Einsatzgruppen.[7]