In Assassin's Creed Unity, which historical event begins the game's French Revolution setting?

The Storming of the Bastille begins Assassin's Creed Unity's French Revolution setting.

The game opens in 1789, the year revolutionaries stormed the Bastille prison in Paris. This event occurred on 14 July and became a defining symbol of the French Revolution. Unity uses the upheaval as the historical backdrop for Arno Dorian's story.

The Bastille sequence introduces the political instability and social conflict that shape the game. Arno later moves through Paris during events including the Reign of Terror, which belongs to a later phase of the Revolution.

The Tennis Court Oath also occurred in 1789, but it was a political pledge made in June. The Battle of Waterloo happened in 1815, well after the period portrayed by Unity. These events are related to French history but are not the opening event asked about here.