Leciri is a moderately sized planet situated perfectly within its parent star's habitability zone. Located in the central core of the Frontier, only a few parsecs from Gela, the planet was originally overlooked for habitation as those colonists looking for comfort settled on that world, while those eager for more remote climes headed deeper into the frontier.

One of the last solar systems explored during the Republic’s initial expansion beyond its first few colonies, Liguria had been an exciting target for Umbrian astronomers. They had initially estimated that the system’s sun, a yellow-white main sequence star, harbored two possible candidates for habitable worlds, as well as an extensive debris field that may have contained valuable minerals.

Gela is a gleaming gem of a planet; located in the approximate center of the Frontier. It possessed everything that an explorer could hope to find after endless months trapped in the confines of their ship. Her atmospheric composition and pressure, gravity, and temperature range all closely match those of Umbria itself.

Constantly pulled to its breaking point and baked by the intense solar discharge of its parent trinary stars, Enaria is the physical embodiment of the Umbrians' mythic underworld. Active vulcanism coupled with its eccentric orbit around its parent stars ensure that what solidified surfaces manage to form are constantly in motion before being subsumed back down into the molten mantel of this hellish world.

Ceilomina was the administrative center of the Vaghus system, whose four baren planets orbited around their parent blue giant at significant distances. Originally considered inconsequential by the Republic explorers who first discovered it, the settlement of other nearby systems would lead to the establishment of a small refining station, which was capable of refueling the freighters and colony ships that plied the surrounding star lanes.

When considering worlds for potential colonization, the Republic has created a standard two-factor classification system known as the habitability gradient. This alphanumeric value is vitally important for those who seek to settle on or exploit new worlds, as it directly impacts both the private sector and governmental support they are likely to receive for their efforts.