Larma and others founded the Parbatya Chhatagram Jana Shanghatti Samiti ( PCJSS ) as a united political organisation of all native peoples and tribes in 1973 . The armed wing of the PCJSS , the Shanti Bahini was organised to resist government policies . The crisis aggravated during the emergency rule of Sheikh Mujib , who had banned all political parties other than his BAKSAL and the successive military regimes that followed after his assassination in 1975 . In 1977 , the Shanti Bahini launched their first attack on a Bangladesh Army convoy . It is alleged that the Indian government helped the Shanti Bahini set up bases across the border from Bangladesh
assassination in 1975
Assassination of Sheikh Mujibur Rahman
Chittagong Hill Tracts conflict