1978
Babbar Khalsa was formed.
1984
June 6: Around 800 Sikh militants and 200 soldiers died when Indian troops stormed the Golden Temple in Amritsar, the Sikhs' holiest shrine.
Oct. 31: Indian Prime Minister Indira Ghandi was assassinated by her Sikh bodyguards. The Sikhs were said to be acting in retaliation for the storming of the Sikh Golden Temple in June.
1985
June 23: Air India Flight 182 crashed off the coast of Ireland after a bomb exploded on board. All 329 people aboard the plane were killed. A second bomb exploded in Tokyo's Narita airport the same day. The bag containing the bomb was being transferred to another Air India flight. Both bombs were believed to have originated in Vancouver, Canada. Members of the Babbar Khalsa Society in Canada were blamed for the bombings.
1992
Aug. 9: Indian police ambushed and killed Babbar Khalsa leader Sukhdev Singh Babbar near Sahnewal.
Oct. 15: Talwinder Singh Parmar was killed in Punjab during an encounter with Indian police.
1995
Aug. 31: Punjab Chief Minister Beant Singh was assassinated at the offices of the civil secretariat in Chandigarh. Singh was known for his hard-line approach to the Sikhs. BKI militants were blamed for the murder.
2004
Jan. 22: BKI members Jagtar Singh Hawara (BKI chief of Indian operations), Jagtar Singh Tara and Paramjit Singh escaped from the Burail high-security prison in Chandigarh. The three were serving time for the assassination of Beant Singh.
2005
May 22: Bombs exploded in two Delhi cinemas showing the movie "Jo Bole So Nihaal" ("Blessed is the One"), which many Sikhs found offensive. One person died and 49 were injured in the bombings.
June 8: Police capture Jagtar Singh Hawara and another BKI member in a raid in a suburb of New Delhi. Paramjeet Singh Bheora later replaced Hawara as BKI chief of Indian operations.
Nov. 19: Police foiled a suspected BKI attack in Chandigarh and Delhi, arresting three members and seizing bomb materials and ammunition in their possession.
2006
March 20: Paramjeet Singh Bheora and two other BKI members were arrested in Delhi.
2007
July 27: A special court in Chandigarh convicted six BKI members on charges related to the 1995 assassination of Beant Singh. Those convicted included Jagtar Singh Hawara, Balwant Singh, Shamsher Singh, Lakhwinder Singh, Gurmeet Singh and Naseeb Singh.
Dec. 13: An attempt to assassinate three sect chiefs in Punjab was foiled by police. The senior three BKI members were arrested and two explosive devices recovered. The police also seized bomb-making materials. Twelve other BKI members escaped, according to police.
2008
Jan. 4: Police in Delhi foiled an attack on a Ropar-based religious leader by arresting four BKI militants.