USA HISTORY

Detailed explanation-1: -Unions have historically formed to ensure fair wages, benefits and better working conditions for their members. They negotiate with businesses and governments on behalf of employees, who either work a particular type of job or in a particular industry.

Detailed explanation-2: -Radical unionists had called a mass meeting in Haymarket Square to protest police brutality in a strike action. A bomb was thrown into the crowd, killing seven policemen and injuring 60 others. Police and workers fired on each other. Public demand for action led to the arrest of eight anarchists (see anarchism).

Detailed explanation-3: -Following the confrontation, in which several police officers and demonstrators were killed and scores injured, August Spies and seven other labour leaders were tried and convicted of murder. Four of them, including Spies, were hanged; one committed suicide; and three were eventually pardoned by Illinois Gov.