Progressive People's Party (Germany) in the context of "Reichstag Peace Resolution"

The German Democratic Party (Deutsche Demokratische Partei, DDP) was a liberal political party in the Weimar Republic, considered centrist or centre-left. Along with the right-liberal German People's Party (Deutsche Volkspartei, DVP), it represented political liberalism in Germany between 1918 and 1933. It was formed in 1918 from the Progressive People's Party and the liberal wing of the National Liberal Party, both of which had been active in the German Empire.

After the formation of the first German state to be constituted along pluralist-democratic lines, the DDP took part as a member of varying coalitions in almost all Weimar Republic cabinets from 1919 to 1932. Before the Reichstag elections of 1930, it united with the Volksnationale Reichsvereinigung, which was part of the national liberal Young German Order (Jungdeutscher Orden). From that point on the party called itself the German State Party (Deutsche Staatspartei, DStP) and retained the name even after the Reich Association left the party. Because of the connection to the Reich Association, members of the left wing of the DDP broke away from the party and toward the end of the Republic founded the Radical Democratic Party, which was unsuccessful in parliament. Others joined the Social Democratic Party of Germany (SPD).

Federal elections were held in Germany on 12 January 1912. Although the Social Democratic Party (SPD) had received the most votes in every election since 1890, it had never won the most seats, and in the 1907 elections, it had won fewer than half the seats won by the Centre Party despite receiving over a million more votes. However, the 1912 elections saw the SPD retain its position as the most voted-for party and become the largest party in the Reichstag, winning 110 of the 397 seats.

Parties hostile or ambivalent to the ruling elites of the German Empire – the Social Democrats, the Centre Party, and the left-liberal Progressives – together won a majority of the seats. This allowed a successful censure vote against the government of Theobald von Bethmann Hollweg over the Saverne Affair in 1913 and the passage of the Reichstag Peace Resolution of 1917. However, the Centre and the Progressives were unwilling to act consistently in opposition, which left the government largely free to do as it wished.