Bulgaria signed the Armistice of Salonica on 29 September 1918. The Ottoman Empire signed the Armistice of Mudros on 30 October 1918. Between 24 October and 3 November 1918, Italy defeated Austria-Hungary in the battle of Vittorio Veneto, which forced Austria-Hungary to sign the Armistice of Villa Giusti on 3 November 1918. So, in November 1918, with internal revolution, the Allies advancing toward Germany on the Western Front, Austria-Hungary falling apart from multiple ethnic tensions, its other allies out of the war and pressure from the German high command, the Kaiser and all German ruling kings, dukes, and princes abdicated, and German nobility was abolished. On 9 November, the Social Democrat Philipp Scheidemann proclaimed a republic. The new government led by the German Social Democrats called for and received an armistice on 11 November. It was succeeded by the Weimar Republic. Those opposed, including disaffected veterans, joined a diverse set of paramilitary and underground political groups such as the Freikorps, the Organisation Consul, and the Communists.