Buenos Aires massacre in 1919
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With the massacre of Buenos Aires in 1919 on January 16, 1919 the labor dispute, organized by anarchists and syndicalists , over a wage increase in Pedro Vasena and Sons Ltd. metal works factory ended.
In addition to all branches of the armed forces of Argentina , the Liga Patriótica Argentina also took part and carried out a pogrom . About 800 workers were murdered and about 4,000 injured. 55,000 people were arrested.