The party traces its beginning to committees and party's cells of the Russian Social Democratic Labour Party (RSDLP) that existed at the end of the 19th century in all bigger cities and industrial centers on Ukrainian territory which was part of the Russian Empire. Under influence from the League of Struggle for the Emancipation of the Working Class in Saint Petersburg, in 1897 such organization was also formed in Kyiv and Yekaterinoslav which also were taking part in preparation and convocation of the 1st Congress of the Russian Social Democratic Labour Party in 1898. With release of newspaper Iskra in December 1900 in Germany, on territory of Ukraine spread out a network of the Lenin's Iskra group and organizations. Among the most notable activists in Ukraine during that period were Ivan Babushkin, Rosalia Zemlyachka, Pyotr Krasikov, Isaak Lalayants, Friedrichs Lengniks, Maxim Litvinov, Grigory Petrovsky, Mykola Skrypnyk (Nikolay Skripnik), Dmitry Ulyanov, Vasiliy Shelgunov, Alexander Schlichter, Alexander Tsiurupa, and others. Following the 2nd Congress of the Russian Social Democratic Labour Party (1903) in social-democratic organizations has developed a struggle between Mensheviks and Bolsheviks. On behalf of Vladimir Lenin, in 1904 Vatslav Vorovsky with Lalayants and Levitskiy created in Odessa the Southern Bureau of the RSDLP that led activities of Odessa, Yekaterinoslav, Nikolayev committees, brought together around itself Bolshevik organizations of the South, conducted great deal of work in preparation to the 3rd Congress of the Russian Social Democratic Labour Party in 1905.