Dubrillion is a Rim world, S29 on the galactic map, and is covered in lush green forests, rolling plains, many large valleys, and deep blue seas. It orbits near its almost-identical sister planet Desrill. Durbrillion itself has no native sentient life. Durbrillion is slightly larger than the planet Terra, and therefore has 25% more gravity than Terra.

Durbrillion in recent years has begun to thrive as more refugees flee for safer space, and as such many large urban centers have sprung up across the surface of the planet. But before Durbrillion became a new safe house for refugees, Durbrillion had long served as the home to one of the Terran Republic's more notable military academies, Prestige Valley Naval Academy.

Named for the valley it rests in, the academy is a twenty minute shuttle ride from the nearest town. Due to its remote location, the academy is able to train its students in near privacy, and able to have the lay of the land to train them on.