This riot was a direct result of the extreme tensions between laborers and the wealthy business owners. The McCormick Reaper Company was on strike, 4 people had just been killed, tensions were high, and anarchists showed up and began speaking at the rally attended mainly by immigrant workers in May 1886 at Haymarket Square. It was originally intended as a rally to protest the establishment of a National Wage. Someone in the crowd threw a bomb, a riot broke out, 7 policemen died, and as a result 8 innocent German immigrants were arrested and the Knights of Labor were blamed for the riot. The riot resulted in the loss of all sympathy for laborers, and a fear anarchy in the middle class, which became a huge obstacle for the AF of L and Knight's of Labor.