In the year 2060 AD, amidst a facade of tranquility, humanity remained ensnared in its ceaseless internal strife. Euro-American Split and its ramifications birthed the epoch known as the Three-States Era—a clandestine struggle for dominance among the Atlantic Collective, the United States of Europe, and the Pan Pacific Federation. This contest continued even as humanity reached across the cosmos. As military forces amassed on earth and in the void above, the fragile peace teetered. As the world was seemingly poised to enter another conflict. Yet, fate intervened not through mortal hands, but by the intrusion of an unearthly adversary, whose overwhelming might shattered Earth's defenses and its martial prowess alike. Now, three decades hence, the remnants of warring nations coalesce under the banner of the United Forces of Earth (UFE), endeavoring to repel relentless incursions and mount a campaign to reclaim their besieged homeworld.