May 19 -- Union Communications Services, Inc.
Two hundred sixteen miners die from an explosion and its aftermath at the Fraterville Mine in Anderson County, Tenn. All but three of Fraterville’s adult males were killed. The mine had a reputation for fair contracts and pay—miners were represented by the United Mine Workers—and was considered safe; methane may have leaked in from a nearby mine - 1902
Shootout in Matewan, W. Va., between striking union miners (led by Police Chief Sid Hatfield) and coal company agents. Ten died, including seven agents - 1920
(Working Stiffs, Union Maids, Reds, and Riffraff: An Expanded Guide to Films About Labor: The conflict in W. Va. is the subject of the terrific film, Matewan, one of many movies included in this encyclopedic guide to 350 labor films from around the world, ranging from those you’ve heard of—Salt of the Earth, The Grapes of Wrath, Roger & Me—to those you’ve never heard of but will fall in love with once you see them.)
The Steel Workers Organizing Committee, formed by the Congress of Industrial Organizations, formally becomes the United Steelworkers of America - 1942
A total of 31 dockworkers are killed, 350 workers and others are injured when four barges carrying 467 tons of ammunition blow up at South Amboy, N.J. They were loading mines that had been deemed unsafe by the Army and were being shipped to the Asian market for sale - 1950