What event in 1886 significantly damaged the reputation of the Knights of Labor?

The Haymarket Square Bombing in 1886 significantly damaged the reputation of the Knights of Labor due to its association with violence and radicalism. During a labor rally in Chicago's Haymarket Square, a bomb was thrown at the police, resulting in the deaths of several police officers and civilians. The incident led to widespread panic and backlash against labor organizations, especially the Knights of Labor, who were unfairly linked to the attack despite not being involved. The media portrayed the Knights as anarchists and violent extremists, which severely hampered their influence and membership in the years that followed. This event marked a turning point in the public perception of labor movements, highlighting the challenges they faced in achieving legitimacy and respect in a hostile environment.