In Assassin's Creed Unity, what revolutionary event provides the game's opening historical backdrop in Paris?

In Assassin's Creed Unity, the Storming of the Bastille provides the game's opening historical backdrop in Paris.

The Bastille was stormed on July 14, 1789, by revolutionaries seeking weapons and challenging royal authority. The event became one of the best-known symbols of the French Revolution and is represented at the beginning of Unity's historical storyline.

Unity later moves through other major phases and events of the Revolution, including political violence during the Reign of Terror. Those are not the opening event. The game follows Arno Dorian, an Assassin operating in Paris while revolutionary upheaval transforms the city. Modern France still commemorates July 14 as Bastille Day, although the holiday marks the broader revolutionary tradition as well as the 1789 event.