In Assam , agitation against immigrants started as early as 1979 , led by All Assam Students Union . Their demand was to put a stop on the influx of immigrants and deportation of those who have already settled . It gradually took violent form and ethnic violence started between Assamese and Bengalis , mostly Muslim . It eventually led to the infamous Nellie massacre in 1983 due to a controversy over the 1983 election . In 1985 Indian Government signed the Assam accord with the leaders of the agitation to stop the issue . As per the accord India started building a fence along the Assam-Bangladesh border which is now almost complete . However Assam also has a large number of genuine Indian Muslim Bengalis . It is difficult to distinguish between illegal Bangladeshis and local Bengali speakers
Nellie massacre
Nellie massacre
Greater Bangladesh