Bolshevik–Leninist Party of India, Ceylon and Burma

Bolshevik–Leninist Party of India, Ceylon and Burma (BLPI) was a revolutionary Trotskyist party which campaigned for independence and socialism in South Asia. The party was formed in 1942 as a unification of two Indian groups (the Bolshevik Leninist Party of the United Provinces and Bihar and the Bolshevik Mazdoor Party of India), with the Lanka Sama Samaja Party of Ceylon (Sri Lanka). It was recognised as the Indian section of the Fourth International.

Discussions for the preliminary Committee for the Formation of the Bolshevik - Leninist Party of India took place through underground meetings in Kandy in December 1940 and March 1941 and set the stage for a sole Trotskyist party for India.

During the remainder of World War II, the BLPI influenced the trade union and student movements in several cities. Significant membership was recorded among tramway workers, as well as workers of the Buckingham and Carnatic Mills. The BLPI notably played a major role in the Quit India movement. It produced leaflets and posters giving unconditional support to the movement. It went even further, calling for the troops to revolt. The objective was ultimately for the British expulsion from India. Their efforts to direct the Quit India disruption into a revolutionary one brought significant reprisals, with members forced into hiding. The BLPI was the only political party to give unconditional support to the Royal Indian Navy mutiny.