In 1979 , Assam flared into Assam Agitation ( or Assam Movement ) a popular movement against illegal immigration . The movement , led AASU and AAGSP , set an agitational program to compel the government to identify and expel illegal immigrants and prevent new immigration . The agitational programs were largely non-violent , but there were incidents of acute violence , like the Nellie massacre where over 3000 ( non officially 10000 murdered ) Bengali speaking Muslim were massacred in Nagaon district . It ended in 1985 following the Assam Accord that was signed by the agitation leaders and the Government of India . The agitation leaders formed a political party , Asom Gana Parishad , which came to power in the state of Assam in the Assembly elections of 1985
Nellie massacre
Nellie massacre
History of Assam