In 1914, he emigrated to France and contributed to the Party newspaper
Our Word edited by
Leon Trotsky. Back in Russia after the
February Revolution of 1917, Uritsky became a member of the
Mezhraiontsy group. A few months before the
October Revolution, he joined the
Bolsheviks and was elected to their Central Committee in July 1917. Uritsky played a leading role in the Bolsheviks' armed take-over in October as a member of the
Petrograd Military Revolutionary Committee, and was later made head of the
Petrograd Cheka secret police in January 1918. In this position, Uritsky coordinated the pursuit and prosecution of members of the nobility, military officers, rival socialists, ranking Russian Orthodox Church clerics, and anyone who opposed the Bolsheviks. Because Uritsky was against Lenin's
Treaty of Brest-Litovsk, he resigned his post in 1918, like
Bukharin,
Bubnov,
Piatakov,
Dzerzhinsky and
Smirnov. On March 4, 1918, the Petrograd committee published the first number of the journal
Kommunist, the public organ of the "left communist" opposition, as directed by
Radek and Uritsky. The
Extraordinary Seventh Congress of the Russian Communist Party (Bolsheviks), which was held between March 6 and 8, 1918, rejected the
Theses on the Present Situation that was submitted as a resolution by the "Left Communists". The "Left Communists" Lomov and Uritsky, who were elected to the Central Committee, stated at the Congress that they would not work in the Central Committee, and did not begin work there for several months in spite of insistent demands from the Central Committee. On May 25, 1918, with the Revolt of the
Czechoslovak Legion, the
Russian Civil War began and Uritsky resumed his position on the Central Committee. An opponent of the
death penalty, he nevertheless signed execution warrants approved by his Committee. ==Assassination==