More than 100 Mexican and Filipino farm workers are arrested for union activities, Imperial Valley, Calif. Eight were convicted of ?criminal syndicalism? - 1930
International Hod Carriers & Building Laborers? Union (today?s Laborers? Int?l Union) is founded, as 25 delegates from 23 Local Unions in 17 cities -- representing 8,186 Laborers -- meet in Washington DC - 1903
A group of "puddlers" -- craftsmen who manipulated pig iron to create steel -- met in a Pitsburgh bar and formed The Iron City Forge of the Sons of Vulcan. It was the strongest union in the U.S. in the 1870s, later merging with two other unions to form what was to be the forerunner of the United Steel Workers - 1858