Global Alliance Unison (GAU)

Nihonkoku Shoukan x Gate USKA x Gate UAC x Maharlika Empire, this is a Crossover Story of 4 Isekai Fanfic Gates in one i know, as it takes place in Nihonkoku Shoukan, as it will be first start the inspired by the Fanfic "The Different Worlds" by @TacticalNarrator9000 and this fanfic is also Inspired by the fanfic "Summoning the Countries" by @Ant357627