The German Revolution caused the Kingdom of Prussia to be succeeded by a republic.
Kingdom of Prussia . After the Napoleonic Wars led to the creation of the German Confederation , the issue of more closely unifying the many German states caused revolution throughout the German states , with each wanting their own constitution . Prussia . In November 1918 , the monarchies were abolished and the nobility lost its political power during the German Revolution of 1918 -- 19 . The Kingdom of Prussia was thus abolished in favour of a republic -- the Free State of Prussia , a state of Germany from 1918 until 1933 .