May 4
1886
At Haymarket Square in Chicago, a labor demonstration for an eight-hour workday turned into a riot when a bomb exploded. A mass meeting had been called for that night when a large force of 176 police officers arrived with a demand that the meeting disperse. Someone, unknown to this day, then threw a bomb at the police. In their confusion, the police began firing their weapons in the dark, killing at least four in the crowd and wounding many more. Several police died (only one by the bomb), the rest probably by police fire.












