1904: Fifty thousand members of the Amalgamated Meat Cutters and Butcher Workmen employed in meatpacking plants walk off their jobs; demands include equalization of wages and conditions throughout U.S. plants.
1917: 260 die in Butte mine disaster; fourteen thousand strike against unsafe conditions.
1945: The U.S. Supreme Court invalidates two Florida laws that required state licensing of paid union business agents and registration with the state of all unions and their officers
1981: Major League Baseball strike begins, forces cancellation of 713 games.
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