Tragic Week (Spanish: Semana Trágica), also known as Bloody Week,[1][2] was a series of riots and massacres that took place in Buenos Aires, Argentina, from January 7 to 14, 1919.

An uprising led by anarchists and communists was eventually crushed by the Argentine Federal Police, the military, and the Argentine Patriotic League.

Estimates of the death toll vary but are usually in the hundreds, mostly of workers at the hands of the government forces.

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