On June 21, labor violence erupted at the Southern Illinois Coal Company’s strip mine near Herrin, Illinois. The United Mine Workers (U.M.W.) was in the midst of a nationwide strike, but it had agreed to let members of the steam-shovelmen’s union remove dirt from the site. In mid-June, however, the shovelmen started loading coal. In the strikers’ eyes, this made them scabs—not a good thing to be in Williamson County, where 90 percent of the work force, even shopkeepers and farmers, held U.M.W. cards.
The fighting began on the morning of June 21 when a truckload of laborers, recruited from Chicago without being told they would be strikebreakers, was stopped on the way to the mine. Accounts differ as to who shot first, but gunfire was exchanged on the road and, shortly after, at the mine. One strikebreaker and two strikers were killed, and a third striker was mortally wounded. Within hours, union men from surrounding communities were flocking to the mine, liberating guns and ammunition from stores as they went.