In 1902, a Chita committee was formed, and groups in Achinsk, Barnaul, Kansk, Novonikolayevsk, Petropavlovsk and other locations. In 1903, an Omsk committee was formed. In January 1903 the union was affiliated to the Russian Social Democratic Labour Party, and changed name to Siberian Social-Democratic Union - RSDLP Committee. The union now had begun adhering to the "Iskra" line. The 1st conference of the union held in the summer 1903 reaffirm the commitment of the organization to the "Iskra" line. However, the delegates of the union at the 2nd RSDLP congress, Trotsky and V. E. Mandelson, took a Menshevik position. The union later condemned their behaviour at the congress.