Jewish Socialist FederationThe Jewish Socialist Federation (JSF) was a secular Jewish Yiddish-oriented organization founded in 1912 which acted as a language federation in the Socialist Party of America (SPA). Many of the founding members of the JSF had previously been members of the Bund in Eastern Europe and sought to bring Bundist politics to the socialist movement in the USA.
The JSF split in 1921 over the question of the Bolshevik Revolution, with the organization disaffiliating from the SPA and a minority splitting to form a new organization called the Jewish Socialist Verband (JSV) and remaining affiliated to the SPA. The newly independent JSF soon joined the Workers Party of America (legal arm of the underground Communist Party of America) and merged into a previously-existing Jewish Communist Federation of that organization. Provided by Wikipedia