a deadly clash between striking workers and federal troops in Chicago in 1877 The Haymarket Affair, a bombing during a peaceful worker’s rally in Chicago in 1886 The Thibodaux Massacre ...

May 1st is International Workers’ Day and was established as such in celebration of the struggle for the introduction of the eight-hour workday and in memory of Chicago’s Haymarket Affair ...

Across the pond, the day is noted for its connection to the Haymarket Affair in 1886, in which 10 people were killed in Chicago at a protest aimed at securing an eight-hour working day.