In 1918, at the end of World War I, with the breakup of the multi-ethnic Austro-Hungarian Empire, and with the abolition of the Habsburg monarchy, there were three major political groups competing with one another in the young republic of Austria: the Social Democratic Party of Austria (SDAP), Christian Social Party (CS), and the nationalist Great German Union (Großdeutsche Vereinigung), which became the Greater German People's Party (Großdeutsche Volkspartei, or GVP) in 1920. At the time, smaller parties such as the Communist Party of Austria (Kommunistische Partei Österreichs, or KPÖ) and the Austrian National Socialists (Deutsche Nationalsozialistische Arbeiterpartei, or DNSAP) were neither present in the Reichsrat (Imperial Council) nor the Nationalrat (National Council).