War Measures Act
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The War Measures Act was a Canadian statute that allowed the government to assume sweeping emergency powers. When the act was invoked, citizens could be arrested and imprisoned without the benefit of trial or even a stated explanation. It essentially created a state of martial law throughout the country.
The act was invoked three times in Canadian history: World War I, World War II, and during the October Crisis of 1970.
This act was repealed and replaced with the Emergencies Act in 1988.