Ebert's plans were thrown into disarray when a group known as Revolutionary Stewards ("Revolutionäre Obleute") then forced the SPD leadership to join with the revolutionary forces. That evening a group of several hundred followers of these non-union workers' representatives occupied the Reichstag and held an impromptu debate. They called for the election of soldiers' and workers' councils the next day with an eye to name a provisional government: the Council of the People's Deputies ("Rat der Volksbeauftragten"). The SPD leadership managed to co-opt that process and sent three delegates to the Council set up on 10 November: Ebert, Scheidemann and Otto Landsberg. Ebert became joint Chairman with Hugo Haase of the USPD. Scheidemann was a member of the Council of the People's Deputies for its whole period of existence, from 10 November 1918 to 13 February 1919.