Charles William Ferdinand, Duke of Brunswick-Wolfenbüttel

Charles William Ferdinand, Duke of Brunswick-Wolfenbuttel (9 October 1735-10 November 1806) was the Duke of Brunswick-Wolfenbuttel, a sovereign prince of the Holy Roman Empire, and a general of Prussia and Austria during the French Revolution. In 1792, he commanded the Prussian army that invaded France. Royalist sympathizers in Les Invalides, Paris planned to signal Duke Ferdinand that Paris was weak through their Chappe towers, but through the efforts of Assassin Arno Dorian, the towers were disabled.

Reference

 * Assassin's Creed Unity