Four striking workers are killed, at least 200 wounded, when police attack ademonstration on Chicago?s south side at the McCormick Harvesting Machine plant. The Haymarket Massacre is to take place the following day - 1886
Chicago's first Trades Assembly, formed three years earlier, sponsors a general strike by thousands of workers to enforce the state's new 8-hour-day law. The one-week strike was unsuccessful - 1867
The Int?l Longshoremen?s and Warehousemen?s Union halts shipping on the West Coast in solidarity with Mumia Abu-Jamal, a Philadelphia journalist who many believed was on death row because he was an outspoken African-American - 1999