Küstrin Putsch
The Küstrin Putsch of 1 October 1923, also known as the Buchrucker Putsch after its leader, was a coup attempt against the Weimar Republic by units of the paramilitary Black Reichswehr under Bruno Ernst Buchrucker. It was launched in response to nationalist anger over the government's decision to end passive resistance against the French and Belgian occupation of the Ruhr.