When a gateway to another world tears open the sky above New York City, unleashing an army of medieval soldiers, battlemages, and monstrous beasts, the United States is dragged into a war it could not have imagined. Thrown into the alien world of Lystyn, a land governed by magic and ancient feuds, America's only hope lies with the soldiers on the front line. At the tip of the spear are Master Sergeant John Mason, a stoic and professional Delta Force operator, and First Lieutenant Evan Jackson, a charismatic Marine tank commander. As they lead the charge against the tyrannical Hatson Empire, they must learn to fight an enemy that wields sorcery as easily as steel. But their greatest challenge may not come from the battlefield, as their fates become entangled with Masami, an enigmatic and impossibly powerful native with a hidden agenda, forcing them to question who to trust in a world where modern firepower may not be enough to ensure humanity's survival. Inspired by the concept from GATE: Thus the JSDF Fought There

In a world made up of fantasy and myth, new nations emerge from another world. Magical kingdoms reign across the lands. From grasslands to splendid castles, from mountainous terrains to ocean waters, the kingdoms forged alliances and enemies with one another. On Earth, the entire countries like Japan, South Korea, Australia, New Zealand, Philippines, New Russia, New China, Ukraine, Botswana and the entire North America Continent including the Caribbean Islands vanished-and appeared in the world of Fantasy kingdoms.