École Polytechnique massacre

The massacre is now widely regarded as an act of misogynist terrorism and representative of wider societal violence against women. The anniversary of the massacre is commemorated annually in Canada as the National Day of Remembrance and Action on Violence Against Women. The gunman had said he was against feminism; after the attack, Canadians debated various interpretations of the events, their significance, and the shooter's motives. Some interpretations noted that the shooter had been abused as a child, or suggested that the massacre was the isolated act of a madman, unrelated to larger social issues.
Politicians in the House of Commons responded by passing more stringent gun control laws, and officials took other actions to end violence against women. The massacre also led to policy changes in emergency services protocols to shootings; for instance, that police would intervene immediately to try to reduce casualties. These changes were credited with later minimizing casualties during incidents of shooting in Montreal and elsewhere. This was the deadliest mass shooting in Canada until attacks in Nova Scotia more than 30 years later, which resulted in twenty-two deaths. Provided by Wikipedia