 Complete the following phrase:  He was a member of the Russian Social-Democratic Labour Party from 1904, and later joined the Bolshevik faction, and worked fulltime, illegally, as a party organiser. Arrested on 24 April old style 1908, he spent four years in Vladimir Central Prison, and then was deported to the Irkutsk region. During the October Revolution, he played a major role in bringing Irkutsk under Bolshevik control, and then in creating the Far Eastern Republic. In 1923, he was transferred to Ukraine to supervise organization of the Communist Party committee in Kiev Governorate guberniya in central Ukraine. In 1925, Postyshev became secretary of the Central Committee of the Communist Party Bolshevik of Ukraine, or CPbU. In 192630 he became a member of the Politburo and Organizational Bureau of Ukraines Communist Party. At the 