The Siege of St. Petersburg (The Leningrad Blockade) was one of the most brutal acts in WWII--Germans & Finns choked off the city for over 800 days--many starved and froze to death--survivors resorted to desperate measures for warmth and food. This seems to be a background event in WWII, but it was one of the most destructive, strategic, complicated, and lethal blockades in history and many people don't know about it. I learned of it reading City of Thieves by Davi Benioff.
The article describes the Haymarket riot from how it started to the aftermath of the event. It reveals how the industrial revolution impacted workers negatively, leading them to organize a protest to have eight-hour workdays instead of a ten to fourteen hour workday. It shows how the impact of unfair working conditions from the industrial revolution made people feel they had to protest and even act irrationally when confronted.