May 11
Nationwide railway strike begins at Pullman, Ill. 260,000 railroad workers ultimately joined the strike to protest wage cuts by the Pullman Palace Car Co. - 1894
And this:
May 11, 1894 - The Pullman strike began. Some 260,000 workers joined the walkout called by the American Railway Union to support employees at the Illinois factory where Pullman sleeper cars were made. The strike was eventually crushed with the help of federal troops, signaling a wave of new anti-worker activity by employers and government.
May 11, 1907 - The Minneapolis Millers Union meets and votes to consolidate with the Nailers and Packers Union.
Labor history found here:
http://www.unionist.com/today-in-labor-history & here:
http://www.workdayminnesota.org/index.php?history_9_05_11_2011