Fort de Sable was a French stronghold in the North Atlantic. By the 1750s, it was controlled by Assassin-affiliated gang members. After collecting remnants of Templar Knight James Gunn, Shay Cormac tracked down the resting place of his famed armor within the fort during this period.
- When visiting Fort De Sable, the appearance of Christopher Gist is changed to a random sailor.
- There is no known connection between the fort's name and that of Robert de Sablé.