 Those on the left felt betrayed by the SPD and the other parties of the political centre for siding with the military and other forces that had already been powerful under the Empire (bureaucracy, industrialists, land owners) against communist or socialist protests.Since SPD, Zentrum and DDP now had only 225 of the 466 Reichstags seats, the old coalition lacked a majority.In addition, the elections did not take place in Schleswig-Holstein, Upper Silesia and East Prussia and West Prussia due to the scheduled plebiscites there.