The French Revolution forms the main historical setting for Arno Dorian's story in Assassin's Creed Unity.
Unity begins in 1789 and follows Arno Dorian through Paris during the upheaval that transformed France. Arno becomes involved with the Assassin Brotherhood while investigating the murder of his adoptive father, a Templar leader. His personal story unfolds alongside political violence, factional conflict, and the collapse of the old order.
The French Revolution is generally dated from 1789 to 1799. The game depicts major themes and figures from that period, including the storming of the Bastille, the revolutionary government, and Napoleon Bonaparte. It combines real events with fictional characters and secret-society plotlines.
The game is called Unity because it emphasizes cooperative multiplayer missions, allowing several players to control Assassins in the same Parisian setting. Arno's storyline, however, can also be played as a single-player campaign.