|This article is about defensive structures. You may be looking for a memory of Edward Kenway.|
Forts are military complexes engineered for the defense of territory.
During the early 18th century, the pirate Edward Kenway assaulted and captured ten forts under the control of either the Royal Navy or Spanish Navy throughout the Caribbean, whereas during the Seven Years' War, Templar Shay Cormac captured forts under control by the French Navy throughout the Northern Atlantic Ocean and River Valley. During the American Revolutionary War, Edward's grandson, the Assassin Ratonhnhaké:ton, captured several forts under the control of the British Army, located in Boston, New York, and the Frontier.
When Kenway or Cormac assaulted a fort, they first used their ship's cannons to destroy all of the outer walls and towers, rendering the fort vulnerable. They would then infiltrate the fort itself, kill its officers, destroying powder reserves, and break into the war room, where they would dispatch the commander. In the case of Edward taking over, the fort's flag would be lowered and replaced with a black one, and served as outposts for pirates in the nearby waters. When taken over by Shay, the flag would be replaced by a British one. 
In Colonial America, after destroying a fort's gunpowder reserves and killing its captain, Ratonhnhaké:ton lowered the British flag in exchange for a Colonial one. By doing so, control of the fort shifted from British control to that of the Continental Army.
By capturing the forts in the Caribbean, Edward was able to exert his piratical influence over a much greater area, as the forts would attack any passing warships. In addition, capturing a fort would clear away a part of the map, detailing previously undiscovered locations. In the Thirteen Colonies, capturing the forts helped make the trade routes much safer, as previously there had been a higher risk of losing trade vessels, such as convoys, to bandits.
- Forts replace Borgia Towers from Assassin's Creed: Brotherhood and Assassin Dens from Assassin's Creed: Revelations.
- Liberated forts in Assassin's Creed III, Assassin's Creed IV: Black Flag, and Assassin's Creed Rogue can be used as fast travel points.
- In Assassin's Creed III, when used as a fast travel point by Connor, a liberated fort will occasionally spawn a single British soldier, who will then be killed by the fort's Continental soldiers.
- When warships pass captured forts in Assassin's Creed IV: Black Flag and Assassin's Creed: Rogue, they will be fired upon by the fort's cannons although no military force will appear manning the cannons after the fort is captured. In Rogue, British soldiers could be hostile to Shay should he chose to attack them.
- In Assassin's Creed IV: Black Flag, forts captured by pirates would still appear to be damaged from the previous bombardment by the Jackdaw, but in Assassin's Creed: Rogue, captured forts would be in their normal state, as they are now administered by British forces.
- Assassin's Creed (first appearance)
- Assassin's Creed: Altaïr's Chronicles
- Assassin's Creed II
- Assassin's Creed: Brotherhood
- Assassin's Creed III
- Assassin's Creed IV: Black Flag
- Assassin's Creed: Rogue
- Assassin's Creed: Unity
- Assassin's Creed Chronicles: China
- Assassin's Creed: Origins
- Assassin's Creed: Odyssey