Industrial Workers of the World (IWW) founded in Chicago - 1905

In one of the most controversial decisions in the Supreme Court's history, Lochner v. New York, the Court holds that a law limiting working hours for New York bakery workers is unconstitutional; the decision has since been effectively overturned - 1905

A sympathy strike by Chicago Teamsters in support of clothing workers leads to daily clashes between strikebreakers and armed police against hundreds and sometimes thousands of striking workers and their supporters. By the time the fight ended after 103 days, 21 people had been killed and 416 injured - 1905