[2] The party was the main political force in Purulia District from the independence of India until the fall of the second United Front cabinet.
[4] LSS was constituted as a political party by former leaders of the Indian National Congress, who had played a leading role in the Quit India movement in Purulia District.
[3] Through forming LSS they wanted to promote use of Bengali language in Bengali-dominated areas in southern Bihar state.
[8] Ahead of the States Reorganisation Act, 1956, LSS organised a movement in 1955 to secure the transfer of Bengali-speaking areas of Bihar into West Bengal.
[3] The party organized a march of satyagrahis by foot from Pakbirah village (Manbhum District) to Calcutta, a 480 km walk.
[9] When reaching the vicinity of the West Bengal government headquarters, the march was broken up by police and participants arrested.
[12][13] After the election Bibhuti Dasgupta of LSS was named Minister for Panchayats and Social Welfare in the first United Front government.
[16] After the election LSS politician Bibhuti Dasgupta was named Panchayat Minister in the second United Front cabinet.
[19] In line with Gandhian principles, LSS ran relief activities in during food scarcities, floods and other calamities.