Returning to Berlin after the end of the war in November 1918, Reinhard in December established a
Freikorps unit named after him (). On 24 December 1918, he assumed the duties of the Commandant of Berlin. Under his leadership, the
Spartacist uprising was crushed in January 1919. During the
Berlin March Battles two months later, there were renewed armed clashes in which approximately 1,200 people were killed, most of them insurgents. In June 1919, the "Freikorps Reinhard" was incorporated into the provisional
Reichswehr and Reinhard was appointed commander of the 15th Infantry Brigade in Berlin. After the
Weimar Constitution went into effect in August 1919, members of the military were required to pledge an oath of allegiance to defend the new republic in front of the new
Black-Red-Gold Flag. Reinhard refused to take the oath and former
chancellor Philipp Scheidemann called for him to be dismissed from the army. The minister of defense
Gustav Noske and the chief of the army high command, General
Walther Reinhardt, sought to negotiate a compromise that would allow him to remain in the
Reichswehr but Reinhard was retired from active military service in December 1919. == Political and SS career in Nazi Germany ==