Sanctuary

Epsilon Eridani b, also known more commonly as Sanctuary, is a planet in the Epsilon Eridani star system. It's size is somewhat larger than the late Earth, being classified as a Super Earth. The terrestrial surface of the planet is also extremely similar to Earth, making it a prime candidate for human populations, as it is a planet that underwent convergent evolution with Earth. It is the homeworld of the Niax'aiv'ia.

History
The planet Epsilon Eridani b was suspected to exist as early as the 1990s by a team of Canadian researchers led by Bruce Campbell and Gordon Walker. In the year 2000, an astronomer named Artie Hatzes, along with his team of other researchers, formally discovered the planet, and 6 years later, the Hubble Space Telescope had confirmed the existence of an exoplanet orbiting the star Epsilon Eridani. With the rapid advancement of spacefaring technology in the 1950s to the 90s and the first Americans setting foot on Mars in the 1980s, humans were able to colonize the planet as soon as the year 2140. The first colonies set up on Epsilon Eridani b were administrated by the government of the North American Union, in the areas that are now known as the United States of Aurelia.

The planet got it's name due to it being one of the first exoplanets colonized by humanity, marking it as a sanctuary for humanity and continuing its survival in the galaxy. With the onset of The Collapse, the colonies were left unmanaged and disconnected, bringing anarchy to Sanctuary. Most original colonies had been abandoned on the planet by the 2500s, with minor recolonization efforts restarting around the mid-to-late 2500s. The planet's first country following the collapse was the Federation of Aurelia, being based on the planet's moon Aurelia whose colonies had never been abandoned. More colonization efforts began following the establishment of Aurelia on the planet, with Vrenuin being the second oldest country on the planet and hailing from roots of the Scandinavian Union. The Japanese arrived as well, founding the Republic of Toshiro. What followed was a deadly struggle over multiple decades by Vrenuin and Aurelia, with skirmishes to gain control as the dominant superpower of the planet.

When the generation ship carrying the descendants of North American Union citizens finally arrived at Sanctuary and was forcefully boarded by the Aurelians and forced to land, the inhabitants of the ship rebelled, forming the United States of Aurelia which aimed to replace the Federation. This sparked the beginning of the Aurelian Civil War. The movement gained strong support by Vrenuin, and the movement eventually grew into an efficient and structured government with military structure, infrastructure, and a civilian populace.