#OtD 11 Nov 1887 4 of the Haymarket martyrs were executed in Chicago. They were anarchist labour organisers framed for a bombing because of their role in the fight for the 8-hour day. Learn more in this history of May Day, which commemorates them: https://shop.workingclasshistory.com/products/the-incomplete-true-authentic-and-wonderful-history-of-may-day-peter-linebaugh