General Jewish Labour Bund (GJLB)
In the Russian Empire, a Jewish workers’ movement took shape quite early because the parts of the “rayon” in which the Jewish population lived was also one of the first regions to undergo industrialisation.
The GJLB was established in 1897; it was socialist and (largely) dismissive of Zionism. It played an important role in the 1905 Russian Revolution, but turned against the Bolsheviks in 1917, which resulted in pro-Bolshevik groups seceding from the group. Information about the history and influence of the GJLB can be found at this research portal among others.