The Left SRs left their coalition with the Bolsheviks in July 1918 in protest against the signing of the Treaty of Brest-Litovsk three months prior. An uprising against the Bolsheviks by the leadership of the Left SRs resulted in the immediate arrest of most of the party's members. Most of the Left SRs who opposed the uprising were gradually freed and allowed to keep their government positions, but were unable to organize a new central organ and gradually splintered into multiple pro-Bolshevik parties, which would all ultimately merge with the Russian Communist Party (Bolsheviks) by 1921. The Right SRs supported the Whites during the Russian Civil War of 1917–1922, but the White movement's anti-socialist leadership increasingly marginalized and ultimately purged them. A small Right-SR remnant, still calling itself the Socialist Revolutionary Party, continued to operate in exile from 1923 to 1940 as a member of the Labour and Socialist International.