Peterloo was a dreadful event killing 18 people and injuring many more. The French Revolution 30 years earlier resulted in the execution of thousands and the deaths of at least 40,000. A line of history through that event is interesting as well.
Let's not forget millions of people suffering in serfdom under the Ancien Regime.
> Banners bearing slogans such as “Liberty and Fraternity” and “Taxation without Representation is Unjust and Tyrannical” flapped in the breeze