Ukrainian Social Democratic Labour Party

The Ukrainian Social Democratic Labour Party, also known as Esdeky and SDPists, was the leading party of the Ukrainian People's Republic. The party was reformed in 1905 at the Second Congress of the Revolutionary Ukrainian Party and was pursuing Marxism through the Social Democratic Party of Germany's Erfurt Program as well as national and cultural autonomy. Party leaders were Volodymyr Vynnychenko, Symon Petliura, Mykola Porsh, Dmytro Antonovych, Lev Yurkevych, Mykhailo Tkachenko, and Mykola Kovalsky.