Kancolle/Azur Lane: Belligerent Isekai

2 decades after the Great War that ended in allied victory, mysterious monsters came from the ocean and attacked the 4 new world superpowers of earth; the United States, the German Empire, the British Empire, and Imperial Japan. With newly discovered technology and a need for revenge, the 4 powers form the Quad Alliance and travel to the world these monsters came from, only to find a new world with very new things to learn.