Tripoli is the capital city of Libya.
In 1511, Tripoli had been conquered by the Spanish Army, led by Pedro Navarro. The Ottoman Assassins came seeking his expertise in weaponry and explosives, and returned to investigate his apparent kidnapping. They also seized the city from Templar control, installing several Assassin Dens.
In 1796, the United States and the Ottoman province of Tripoli signed a treaty, protecting Americans sailing in the Mediterranean Sea from their privateers. The treaty included a clause mentioning that religious differences between the two countries were no reason for them to go to war.