What happened in Chicago on May 3 1886 three days after the May Day March?

On May 3, 1886, a violent confrontation occurred during a labor rally at Haymarket Square in Chicago. Police attempted to disperse the crowd, which had gathered to support striking workers advocating for an eight-hour workday. In the ensuing chaos, a bomb was thrown at the police, resulting in the deaths of several officers and civilians, and leading to a brutal crackdown on labor activists. This incident marked a significant turning point in the labor movement in the United States and is often commemorated as part of International Workers' Day.