September 21
Militia sent to Leadville, Colo., to break miners strike - 1896
And this: September 21, 1896 - The militia was sent to Leadville, Colorado, to break a miners’ strike. In the latter half of the 19th century, Leadville emerged as a leading mining community because of the rich silver deposits nearby. Though Leadville and other communities owed their existence to the mines, only a minority of citizens actually labored there. Many more were engaged in construction, retailing and service labor. Colorado was the nation’s leading mining region, turning families such as the Guggenheims into wealthy artistocrats.
Mother Jones leads a march of miners' children through the streets of Charleston, W. Va. - 1913
National Football League Players Assn. members begin what is to become a 57-day strike, their first regular-season walkout ever - 1982
labor history found here:
http://www.workdayminnesota.org/index.php?history_9_09_21_2011 & here:
http://www.unionist.com/big-labor/today-in-labor-history