Backward Caste movement in Bihar
The Backward Caste movement in Bihar can be traced back to the formation of Triveni Sangh, a caste coalition and political party, in the 1930s, which was revived after the introduction of land reforms in the 1950s aimed at removing intermediaries from agrarian society. But, this drive could not succeed in bringing long-lasting changes in the condition of lower strata of society, as they lacked political representation and economic power.
Source: Wikipedia — Backward Caste movement in Bihar (CC BY-SA 4.0)