The Haymarket affair (also known as the Haymarket riot ) was a disturbance that began at a strike rally in Haymarket Square in Chicago on May 4, 1886. An unknown person threw a bomb at police as they dispersed the public meeting. The bomb blast and ensuing gunfire resulted in the deaths of eight police officers and an unknown number of civilians. In the internationally publicized legal proceedings that followed, eight anarchists were tried for murder. Four were put to death, and one committed suicide in prison.
The Haymarket affair is generally considered to have been an important influence on the origin of international May Day
observances for workers. In popular literature, this event inspired the caricature of "a bomb-throwing anarchist." The causes of the incident are still controversial, although deeply polarized attitudes separating business and working class
people in late 19th century Chicago are generally acknowledged as having precipitated the tragedy and its aftermath. The site of the incident was designated as a Chicago Landmark
on March 25, 1992. The Haymarket Martyrs' Monument in nearby Forest Park was listed on the National Register of Historic Places
and as a National Historic Landmark
on February 18, 1997. (read more...