on Guru Arjan Dev Martyrdom Day, Bhindranwale was killed by the Indian military in the operation. The operation carried out in the Gurudwara caused outrage among the Sikhs and increased the support for Khalistan Movement. Four months after the operation, on 31 October 1984, Prime Minister of India, Indira Gandhi was assassinated in vengeance by her two bodyguards, Satwant Singh and Beant Singh. Public outcry over Gandhi's death led to the slaughter of Sikhs in the ensuing 1984 Sikh Massacre. These events played a major role in the violence by Sikh militant groups supported by Pakistan and consumed Punjab until the early 1990s when the Khalistan movement was eventually crushed in Punjab. In the mid-1990s, the insurgency petered out, and the Khalistan movement failed to reach its objective due to multiple reasons including a heavy police crackdown on civilians and militants, factional infighting, and loss of public support, with the militancy brought under the control of law enforcement agencies by 1993. Background In the 1950s the Punjabi Suba movement for linguistic reorganisation of the state of Punjab and status for the Punjabi language took place, which the government finally agreed to in 1966 after protests and recommendation of the States Reorganisation commission. The state of East Punjab was later split into the states of Himachal Pradesh, the new state Haryana and current day Punjab. The process of Sikh alienation from the national mainstream was set in motion shortly after Independence due to the communalism of national and regional parties and organization including the RSS, Jan Sangh, and the Arya Samaj, exacerbated by Congress mishandling and local politicians and factions. According to Indian general Afsir Karim, many observers believed that separatist sentiments began in 1951 when Punjabi Hindus disowned the Punjabi language under the influence of radical elements, and "doubts on the concepts of a Punjabi Suba" created mutual suspicion, bitterness, and further misunderstanding between the two communities. The 1966 reorganization left the Sikhs highly dissatisfied, with the unresolved status of Chandigarh and the distribution of river waters intensifying bitter feelings. While the Green Revolution in Punjab had several positive impacts, the introduction of the mechanised agricultural techniques led to uneven distribution of wealth. The industrial development was not done at the same pace of agricultural development, the Indian government had been reluctant to set up heavy industries in Punjab due to its status as a high-risk border state with Pakistan.