The Spartacists were a threat from the left where from 5 – 12 January 1919, 50,000 members of the post-World War One CommunistParty, known as the Spartacists, rebelled in Berlin, led by Rosa Luxemburg and Karl Liebknecht.
In the aftermath of the Spartacist uprising, communist workers' councils seized power all over Germany, and a Communist People's Government took power in Bavaria.