the earliest Marxist-influenced parties in the world. A member of the Weimar Coalition, the SPD supported the parliamentary system of democracy and extensive social programs in the economy. For most of the Weimar Republic's existence until 1932, the SPD was the largest single party in the Reichstag and it participated in several coalition governments. Its party newspaper was the Vorwärts. (Pro-Weimar Republic) Sozialistische Arbeiterpartei Deutschlands (SAPD) — Socialist Workers' Party of Germany. A left-wing faction that split from the SPD in 1931. Parts of the USPD and dissenters from the KPD and the KPO joined it, but it remained small. Its political positions were near to those of the USPD, wavering between the SPD and the KPD. Sozialistischer Bund — Socialist League. A splinter party that formed from the USPD in 1922 and merged into the SADP in 1931. Unabhängige Sozialdemokratische Partei Deutschlands (USPD) — Independent Social Democratic Party of Germany. This was formed by an anti-war faction that split from the SPD in 1917. It was a Marxist party that sought change through parliament and social progressive programs. The left-wing majority of the party joined the Communist Party in December 1920, while the remainder reunited with the MSPD in September 1922. A splinter element (Sozialistischer Bund) continued as an independent party, never attaining any real electoral success and finally merging with the SAPD in 1931. (Against the government) Vereinigte Kommunistische Partei Deutschlands (VKPD) — United Communist Party of Germany. Name taken by the KPD when it merged with the majority of the USPD in December 1920. It reverted to its former name in 1922. (Against the government) Centre Deutsche Bauernpartei (DBP) — German Farmers' Party. An agrarian party founded in 1928 to advocate for the economic interests of small farmers and peasants. Deutsche Demokratische Partei (DDP) — German Democratic Party. Formed in 1918 as the successor to the Progressive People's Party, the DDP was a center-left party that supported social liberalism. A member of the Weimar Coalition, it was one of the main liberal parties and participated in several coalition governments. (Pro-Weimar Republic) Deutscher Staatspartei (DStP) — German State Party. Formed in 1930 by a merger of the DDP and the Volksnationale Reichsvereinigung (VNRV) (People's National Reich Association), the political wing of the Young German Order. The VNRV Reichstag delegates soon seceded from the party, leaving it essentially the DDP under a new name. (Pro-Weimar Republic) Deutsche Volkspartei (DVP)