Sabotage cannon is an optional objective in the Sequence 3 memory Execution is everything
Walkthrough[edit]
Haytham needs to sabotage 2 cannons inside this fort. This is most easily done after stealing the tactic map as the cannons are both close to this location.
The first cannon is very close to where the map is. Move through the bushes and get as close to it as you can without breaking cover. Watch the Soldier who is patrolling nearby. Wait for him to move away. Move in and interact with the cannon to disable it. After that quickly duck into the nearby bushes and wait for a chance to slip away.
Getting to the second cannon presents its own little challenge. it is a lot easier as you can slip over the wall by the first cannon and keep to the side of the fort. The caution there is the ledges are narrow. Just be careful that you do not fall off the ledge. From there you can easily get to the second cannon. Wait for the patrolling Soldier to move away then you can slip up to the cannon and sabotage it.
