The Peterloo massacre was one of the worst atrocities committed on British soil, but across the empire there were many such acts.
As well as an attack on the working classes, Peterloo was also an episode of violence against women.
Lessons from the British 19th century protests over electoral reform about the significance of crowd sizes.
As a left-wing rallying cry, this account of the 1819 massacre in Manchester fails to rouse the inner revolutionary.