The Seswenna system, a star system situated in the Outer Rim Territories, was home to the planet known as Seswenna. This planet served as a bastion for the Galactic Republic. As the Nihil marauders carried out an expansion of their [Stormwall](/article/stormwall] barrier, which enclosed their region called the Occlusion Zone, the Seswenna system was divided by the Stormwall, resulting in Seswenna being located inside Nihil space.