July 16

Ten thousand workers strike Chicago's Int’l Harvester operations - 1919
 
Martial law declared in strike by longshoremen in Galveston, Texas - 1920
 
San Francisco Longshoreman's strike spreads, becomes 4-day general strike - 1934

More info & ammo for unionists is available
online from Union Communication Services.

http://www.unionist.com/