DCI: Last Alliance is a submod for Third Age: Total War, focused on the War of the Last Alliance in the Second Age of Middle-earth.
On question to the Harad video, from AugustusNocturnis, we take the time to present the fleets of the War of the Last Alliance.
These ships can be recruited by the Wild Men of Enedwaith, Hill-men of the North, Men of the Mountains and Rhovanion.
As a rule of thumb these factions have either limited access to the Sea, or a hard time to build larger ports, but when they do, they can demand respect in the attack.