Nickel One, the main asteroid within the Roche asteroid belt, served as the capital for the Roche system. It was also the native planet of the Verpine species.
After the Yuuzhan Vong War concluded, the Verpine adopted Nickel One as their new homeworld. They continued to operate their main weapons manufacturing plants from this location.
During the Swarm War, a fleet of Killik ships launched an assault on Nickel One. However, Jedi Masters Luke Skywalker and Mara Jade Skywalker, accompanied by Jedi Knight Jacen Solo, successfully defended against the attacking force.
Towards the close of the Second Galactic Civil War, Nickel One came under attack from the Imperial Remnant forces who were loyal to Darth Caedus. Mandalorians defended the asteroid, having previously established a base there following an arrangement with the Verpine.