Radicaux indépendants
During World War I (1914–1918), the Radical-Socialist Party was the keystone of the "Sacred Union" while the most prominent Independent Radical Georges Clemenceau led the cabinet again from 1917 to 1919. He appeared as the "architect of victory", but his relationship with the Radical-Socialist Party deteriorated. The Radical-Socialists and the Independent Radicals entered the 1919 legislative election in opposing coalitions, thus Clemenceau's alliance of the right emerged victorious.