One of them would be the Beer Hall Putsch, an event in which members of the NSDAP or 3rd Reich Nazi party marched to get some important members of the Weimar Republic to side with them so they could spread influence for the NSDAP. At the time there were other parties, such as the Communist party attempting to gain power as well, this is due to the fact that the Weimar Republic was weaker in the case of political power.