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Shot of the Day: The 1971 Gastown Pro-Marijuana Riot

The incident was later dubbed "The Battle of Maple Tree Square."

3 Substance

In August 1971, the Youth International Party held a “smoke-in” pro-marijuana protest in the Gastown district of Vancouver, British Columbia. The protest quickly turned into a riot, after police tried to infiltrate the rally with undercover cops. Cops arrested a total of 79 protestors.