He belonged to the Chakma tribe, which inhabits the Chittagong Hill Tracts of Bangladesh and the neighbouring Indian states of Mizoram and Tripura.

[2] After his release, Larma worked to unite and politically organise the various ethnic groups and tribes of the Chittagong Hill Tracts.

As citizens of Bangladesh we are all Bangladeshis but we also have a separate ethnic identity, which unfortunately the Awami League (the then-ruling party) leaders do not want to understand.

[4][6]On 15 February 1972, Larma founded the Parbatya Chattagram Jana Samhati Samiti (PCJSS), seeking to build an organisation representing all the Jumma Peoples of the Hill Tracts.

[2] When Larma's continued efforts to make the state recognise the rights of the Jumma peoples failed, Larma and the PCJSS began organising the Shanti Bahini (Peace Corps), an armed force operating in the Hill Tracts area, which began attacking state forces in 1977.