Siege of Louisbourg

The Battle of Louisbourg was a naval battle fought between the Royal Navy of United Kingdom and the French Navy, to take control of the Fort of Louisbourg. The battle was a British success, and eradicated the rule of French in Atlantic Canada. The actual reason for the battle was do eliminate the Assassins' activity in Louisbourg by the Templars.

Background
After the death of Colonel George Monro, the Assassin-turncoat Shay Cormac was inducted into the Templar Order by the Grand Master, Haytham Kenway. After a few days, Cormac and Kenway met in New York, and after a brief discussion about Precursor Temples, Kenway informed Cormac about Assassin activity in the Fort of Louisbourg. Cormac was also informed about the Templars' alliance with the Royal Navy officer and explorer, James Cook and his commission was useful for the Templars. Shay agreed and departed. Cormac and his quartermaster, Christopher Gist met Captain Cook and Kenway in the HMS Pembroke, the ship of Cook. There, Cook informed the Templars that a Royal Navy fleet already set sailed for Louisbourg, but the captain was worried about the French defenses. However, the Grand Master insisted to attack the Fort, and the rest agreed. Cook suggested Cormac to captain the ship.

The battle
On the day of battle, the HMS Pembroke was approaching Louisbourg, escorted by two frigates. As the neared the fort, mortar fires of French Men O' War destroyed the escort ships. The HMS Pembroke still fought one, and Cormac utilized the ship's immense firepower and mortars to sink the French Navy ships.

After successfully managing to sink the attacking French Navy, the HMS Pembroke came face-to-face with the Experto Crede, ship of the Assassin Adéwalé. The Experto Crede was leading a fleet of French fireships. Under the advice of Gist, Cormac did not attack the Assassin brig, but instead focused on the fireships. Without damaging the HMS Pembroke, Cormac successfully managed to sink all the fireships. However, they were greeted with more fireships and warships.

Using mortars and broadsides, the HMS Pembroke sank the attacking French ships. While the crew were rejoicing, another French fleet charged towards the HMS Pembroke, but were soon destroyed after British reinforcements arrived. This allowed to Royal Navy to attack and capture Louisbourg.

Aftermath
The Battle of Louisbourg proved to be the turning point of the Seven Years' War, and eased the French opposition. Adewale's interference made him a potential Templar target, and he was eventually chased and killed by Shay Cormac in Vieille Carrière.

Reference

 * Assassin's Creed: Rogue