September Massacres
Sep 2 September Massacres of the French Revolution: In Paris rampaging mobs slaughter 3 Roman Catholic bishops, more than two hundred priests, and prisoners believed to be royalist sympathizers.
- Sep 11 The French Blue gem (later the Hope Diamond) is stolen with other French crown jewels from Royal storehouse in Paris during Reign of Terror
William Bligh and the Mutiny on the Bounty
Sep 12 Court martial begins for instigators of the mutiny on the Bounty on board HMS Duke in Portsmouth harbour, presided over by Vice-Admiral Samuel Hood
- Sep 20 French defeat Prussians at Valmy
French Monarchy Abolished
Sep 21 French Revolution: The National Convention passes a proclamation announcing the formal abolition of the French monarchy
- Sep 22 Day one of the short-loved French Republican calendar (declared 1793, abandoned 1806)
- Sep 22 French First Republic formed by the National Convention, stripping the French king of his powers
Lasource Accuses Robespierre
Sep 26 Marc-David Lasource begins accusing Maximilien Robespierre of wanting a dictatorship for France