The
Strafbataillon were developed from the
Sonderabteilungen () that existed in pre-war Nazi Germany. Initially, Nazi policy was to rebuild the armed forces by keeping "potential troublemakers" away from the troops and removing any "destructive elements" from military service. But on 21 May 1935,
Adolf Hitler decreed that under the new Nazi Defence Act, any
conscript who was deemed "unfit for military service because of subversive activity" would be arrested. However, soldiers who were deemed disruptive to military discipline, but were otherwise "worthy of service", would be sent to military
Sonderabteilungen. Those units were designed to change attitudes toward state and national policy while instilling a sense of duty, honor and purpose. Those goals were to be achieved through harsh discipline and punishments, extensive indoctrination programs, and restrictions on home leave. Troops who conformed were eventually transferred to regular units. However, those who continued to show indiscipline or opposed the military were transferred to
Sachsenhausen concentration camp. Before World War II, there were nine
Sonderabteilungen within the
Wehrmacht in Nazi Germany. According to estimates, between 3000 and 6000
Wehrmacht personnel passed through those special departments. A total of 320 "incorrigible rogues" were transported to concentration camps. However, with the
outbreak of war in 1939, the
Sonderabteilungen were disbanded. They were replaced with the
Feld-Sonder Battalion () under the control of the
Feldgendarmerie. However, as the war continued, the need for more military personnel grew accordingly. Military tribunals were directed by the
OKW to send incarcerated members of the
Wehrmacht, as well as "subversives", to
Bewährungsbataillone () at the front. ==Bewährungsbataillon 500==