After the German Empire lost the First World War and the Kaiser abdicated, the newly established Weimar Republic lingered in an incredibly unstable and chaotic situation. Both the far left and far right rejected parliamentary democracy.
One of the most infamous events must have been the Kapp Putsch. During the night of March 12 1920, an elite paramilitary unit entered Berlin. It aimed to overthrow the democratically elected government and install an autocratic military regime. Surprisingly enough, these paramilitary troops enjoyed support from the actual army and a considerable number of civil servants. For a moment, it looked like the young Weimar Republic already came to an end, before it really had begun.
By Bundesarchiv, Bild 119-1983-0007 / CC-BY-SA 3.0, CC BY-SA 3.0 de, https://commons.wikimedia.org/w/index.php?curid=5415957