July 25

Workers stage a general strike—believed to be the nation’s first—in St. Louis, in support of striking railroad workers. The successful strike was ended when some 3,000 federal troops and 5,000 deputized special police killed at least eighteen people in skirmishes around the city - 1877
 
New York garment workers win closed shop and firing of scabs after 7-month strike – 1890

Fifteen “living dead women” testify before the Illinois Industrial Commission.  They were “Radium Girls,” women who died prematurely after working at clock and watch factories, where they were told to wet small paintbrushes in their mouths so they could dip them in radium to paint dials.  A Geiger counter passed over graves in a cemetery near Ottawa, Illinois still registers the presence of radium - 1937
 
The Teamsters and Service Employees unions break from the AFL-CIO during the federation's 50th convention to begin the Change to Win coalition, ultimately comprised of seven unions (4 by 2011: SEIU, Teamsters, UFCW and the UFW). They say they want more emphasis on organizing and less on electoral politics - 2005