Yadavs in Bihar
Around 1933–1934, the Yadavs joined with the Kurmis and Koeris to form the Triveni Sangh, a caste federation that by 1936 claimed to have a million supporters. This coalition followed an alliance for the 1930 local elections which fared badly at the polls. The new grouping had little electoral success: it won a few seats in the 1937 elections but was stymied by a two-pronged opposition which saw the rival Congress wooing some of its more wealthy leading lights to a newly formed unit called the "Backward Class Federation" and an effective opposition from upper castes organised to keep the lower castes in their customary place. Added to this, the three putatively allied castes were unable to set aside their communal rivalries and the Triveni Sangh also faced competition from the All India Kisan Sabha, a peasant-oriented socio-political campaigning group run by the Communists. The appeal of the Triveni Sangh had waned significantly by 1947 but had achieved a measure of success away from the ballot box, notably by exerting sufficient influence to bring an end to the begar system of forced unpaid labour and by providing a platform for those voices seeking reservation of jobs in government for people who were not upper castes. Many years later, in 1965, there was an abortive attempt to revive the defunct federation.