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Relating to militant Sikh aspirations for Khalistan
October 21, 1914 Canadian Immigration Branch official William Hopkinson, also serving as a police agent from Calcutta, was assassinated inside the provincial courthouse on Vancouver's West Georgia Street by Mewa Singh, a Sikh extremist who had been arrested in mid-July for attempting to smuggle weapons into Canada. On August 31 and September 3, two of Hopkinson's informants had been murdered in Vancouver.
an explosion at Tokyo Narita International Airport killed two baggage handlers, and injured four. The bomb was intended for Air India Flight 301, with 177 passengers and crew on board, bound for Bangkok International Airport.
October 1864 - Agents of the Confederate Secret Service based in Montreal host a visit by John Wilkes Booth, the future assassin of US President Abraham Lincoln. Historians discuss the potential for a conspiracy to have partially formed during his time in Montreal. After police shot Booth, they found a money order for $184,000 drawn from the Montreal Branch of the Ontario Bank.
2006 - In the 2006 Ontario terrorism plot, Canadian counter-terrorism forces arrested 18 terrorists (dubbed the "Toronto 18") inspired by al-Qaeda. They were accused of planning to detonate truck bombs, to open fire in a crowded area, and to storm the Canadian Broadcasting Centre, the Canadian Parliament building, the Canadian Security Intelligence Service (CSIS) headquarters, and the parliamentary Peace Tower, to take hostages and to behead the Prime Minister and other leaders.
August 2010 - Misbahuddin Ahmed of Ottawa was arrested (later convicted in July 2014) of knowingly facilitating a terrorist activity and participation in the activities of a terrorist group.
2013 - The head of Canada’s spy service Richard Fadden has told Parliament that the fragmenting of al-Qaeda has made him more “worried” about terrorist attacks in Canada. He warned that Canadians are involved in every al-Qaeda affiliate group and that these groups have mentioned Canada as a possible target.
July 1, 2013 - Canada Day participants at the British Columbia Provincial Legislature Buildings were targets of an alleged plot by Surrey residents John Stewart Nuttall, 38, and Amanda Korody, 29, to plant pressure-cooker bombs as inspired by al-Qaida. Investigation by RCMP and CSIS prevented implementation of the plot.
October 20, 2014 – On October 20, 2014, two Canadian Forces members were hit by Martin Couture-Rouleau, a recent Muslim convert in what is known as the 2014 Saint-Jean-sur-Richelieu ramming attack. Warrant officer Patrice Vincent died of his injuries. Couture-Rouleau was eventually gunned down and killed.
October 22, 2014 – On the morning of October 22, 2014 at 9:52am, Michael Zehaf-Bibeau, a 32-year-old drug addict and self-convert to Islam, who was known to Canadian authorities, shot and killed Cpl. Nathan Cirillo while the 24-year-old stood guard at the War Memorial in Ottawa, Ontario. In the aftermath of the attack, there was much speculation about whether the attack was an act of terrorism related to Canada’s recent joining in the armed coalition against ISIS, or  a criminal act of a mentally-deranged loner. Canadians are sharply split between those who say it was an act of terrorism or a result of the shooter's mental health issues arising from the lack of mental health access in the country.
1963-1969 - Front de libération du Québec (FLQ) starts a bombing campaign at the average rate of one every ten days. Targets included English owned businesses, banks, McGill University and the homes of prominent English speakers.
1963 FLQ bombing of Canadian Army Recruiting Centre in Montreal, killing Sgt. Wilfred V. O'Neil.
late 1960s - FLQ places a bomb in a window well of the National Defence Headquarters on Lisgar St in Ottawa, Ontario. The explosion killed a cleaning lady.
late 1960s - FLQ places a bomb in a mailbox next to the Canadian Tire store on Wellington St in Ottawa, Ontario.
February 13, 1969 - FLQ sets off a powerful bomb that rips through the Montreal Stock Exchange causing massive destruction and seriously injuring 27 people.
February 22, 1969 - FLQ terrorist bomb explodes at Liberal Party social club in Montreal, injuring two people.
October 5, 1970 - British diplomat James Cross and (on October 10) Quebec Minister of Labour Pierre Laporte are kidnapped by the FLQ in Montreal. (The dead body of Pierre Laporte was discovered in the trunk of a car in Montreal, Quebec on October 17, 1970, and the murderers were arrested on December 26, 1970; Cross was released on December 3, 1970.)
May 8, 1984 - Soldier Denis Lortie, a federalist, enters National Assembly with the intent of killing René Lévesque and the deputies of the Parti Québécois. Due to a great amount of chance, he came in too early and killed 0 deputies (but still killed 3 other people and wounded 13). Unarmed employee René Jalbert negotiated with Lortie for several hours and convinced him to give up his gun and get arrested. Jalbert got decorated the next week.
2000 - The Brigade d'autodéfense du français bombs a church where an English fundraiser was to be held.
2001 - Quebec - The FLQ/The Brigade d'autodéfense du français firebombs three "Second Cup" locations in Montreal. They were targeted because of the company's use of its incorporated English name "Second Cup". Rhéal Mathieu, a previously convicted FLQ terrorist was convicted for all three bombings. Seven McDonald's restaurants were also firebombed.
September 4, 2012 - The night of the Quebec provincial elections, Richard Bain, an anglophone Quebecer attempted to assassinate Parti Québécois leader and Premier elect Pauline Marois at a victory gathering in Montreal. He also set fire to the Metropolis concert hall where the event was being held. A man was killed and another was injured in the terrorist act. It is said that Bain's ultimate goal was to kill Marois following the Parti Québécois victory. Bain was arrested shortly after the attack, is currently incarcerated and was undergoing trial in 2014.
1920s - Arson and bombing by Freedomites (also called Svobodniki or the Sons of Freedom), targeted property of other Doukhobors and government buildings such as schools to exhibit their dislike of materialism, and government pressure to school Svobodnik children
1924 - Peter Verigin was killed, aged 65, in a still-unsolved Canadian Pacific Railway train explosion on October 29, 1924 on the Kettle Valley Railway (now known locally as the Columbia and Western Railway) line near Farron, between Castlegar and Grand Forks, which also killed his 17-year-old female companion Marie Strelaeff, member of the provincial legislature John McKie, P.J Campbell, Hakim Singh, Harry J. Bishop, W. J. Armstrong, and Neil E. Armstrong. The government initially (during investigation) had stated the crime was perpetrated by people within the Doukhobor community, while the Doukhobors suspected Canadian government involvement. To date, it is still unknown who was responsible for the bombing.
1960s - Additional arson and bombings, mostly conducted in the nude, included the bombing of a railway bridge in Nelson, British Columbia in 1961
January 29, 1965 - Two U.S. jets (F-84s) being overhauled by Northwest Industries in Edmonton, Alberta were destroyed and a third damaged when a left-wing group protesting the Vietnam War dynamited the planes; a security guard was killed during the incident. See also Edmonton aircraft bombing.
October 2001 - Shortly after anthrax letters were found in the US, Office of British Columbia Premier Gordon Campbell received letter with white dust that was part of Anthrax hoaxes.
March 5, 2015 - While new anti-terrorism law was under consideration and months before federal election, four Conservative Party Members of Parliament (Denis Lebel, Steven Blaney, Christian Paradis and Maxime Bernier) received letters with white powder (Anthrax hoaxes) and message "Conservateurs, vous serez anéantis," which translates to "Conservatives, you will be annihilated" at their constituency offices in Quebec.
Ross, J.I. (1995). “The Rise and Fall of Quebecois Separatist Terrorism: A Qualitative Application of Factors from two Models,” Studies in Conflict and Terrorism, Vol. 18, No. 4, July, pp. 285–297.
Ross, J.I. (1994). “Low-Intensity Conflict in the Peaceable Kingdom: The Attributes of International Terrorism in Canada, 1960-1990,” Conflict Quarterly, Vol. 14, No. 3, Summer, pp. 36–62.
Ross, J.I. (1992). “Attacking Terrorist Attacks: Initial Tests of the Contagion Between Domestic and International Terrorism in Canada,” Low Intensity Violence and Law Enforcement, Vol. 1, No. 2, Autumn, pp. 163–183.
Ross, J. I. (1988). “Attributes of Domestic Political Terrorism in Canada, 1960-1985,” Terrorism: An International Journal, Vol. 11, No. 3, Fall, pp. 213–233.
Ross, J. I. (1988). “An Events Data Base on Political Terrorism in Canada: Some Conceptual and Methodological Problems,” Conflict Quarterly, Vol. 8, No. 2, Spring, pp. 47–65.