Karl Eduard Wilhelm Groener (German pronunciation: [ˈvɪlhɛlm ˈɡʁøːnɐ] ; 22 November 1867 – 3 May 1939) was a German general and politician. His organisational and logistical abilities resulted in a successful military career before and during World War I.
After a confrontation with Erich Ludendorff the Quartermaster general (Erster Generalquartiermeister) of the German Army, Groener was reassigned to a field command. When Ludendorff was dismissed in October 1918, Groener succeeded him. Groener worked with the new Social Democratic president Friedrich Ebert to foil a left-wing take-over during the German Revolution of 1918–19. Under his command, the army bloodily suppressed popular uprisings throughout Germany.
Groener tried to integrate the military, which was dominated by an aristocratic and monarchistic officer corps, into the new republic. After resigning from the army in the summer of 1919, Groener served in several governments of the Weimar Republic as minister of transportation, interior and defence. He was pushed out of the government in 1932 by Kurt von Schleicher, who was working on a pact with the Nazis.