Project Enclave

USS Illinois (BB-65) an unfinished Iowa-class battleship, at the Philadelphia Naval Shipyard, the Shadow organization of Eagle Union called the Enclave was formed to combat the growing Siren attack problem.
So when they arrived at night before he was combat ready, they took the ship and transported Him to Alaska where they fitted him with the required materials and equipment.

In the Year 1991, the Enclave knew it was only a matter of time before they find the last remnants of Eagle Union. So one grab a golden Wisdom cube a placed it onto the ship and the scientist activated the portal and sucked it into another world, just in time for the portal machine to explode and destroy itself As the Sirens appear and kill everyone inside the base.

Now how would the world of Azur Lane react to a forgotten Battleship given a new life and protect this world from the Sirens as an sole surviving Enclave Warship.