The Attacks on Tulum were a series of attacks on the Assassin headquarters in Tulum, orchestrated by the Templars, and executed by slavers, the British Army, and the Spanish Army. The Assassins withstood all of the attacks, but were eventually forced to relocate to the Great Inagua, which was owned by the pirate Edward Kenway.
The Caribbean Assassins possessed more resources than their Templar counterparts, and were led by two famed Mentors, Bahlam and his son, Ah Tabai. In 1715, Ah Tabai tasked Duncan Walpole, a visiting British Assassin, to investigate rumors regarding a Sage. However, unknown to the Assassins, Walpole secretly corresponded with the Templar Grand Master and governor of Cuba, Laureano de Torres y Ayala, and was set on joining the Templar Order. To prove his loyalty, Walpole transported a blood vial and maps which would disclose the locations of Assassin bureaus located across the West Indies.
While on the way to Havana to meet with Torres, Walpole's ship, the HMS Intrigue was attacked by a pirate vessel, the Jacobite, captained by Abel Bramah. After a long battle, Walpole's ship was eventually sunk by the pirates, but the Assassin managed to reach the Jacobite and assassinate Bramah. A gunpowder explosion caused the pirate vessel to sink as well, killing all on board except Walpole and Edward Kenway.
The pair managed to reach Cape Bonavista, where Walpole was killed in a swordfight with Kenway. While searching through Walpole's belongings, Edward found a letter from Torres, detailing Walpole's future with the Templars. Impressed by the possibility of reward for delivering the items Walpole carried, Edward assumed his identity and travelled to Havana aboard Stede Bonnet's ship, the Revenge. Once he had arrived and gained an audience with the governor, Edward delivered the maps, which eventually led the Templars to Tulum.