The planet Gallius used to reside in the Nerio sector. It was an imperial luxury world that was originally an asteroid but was covered with habitats to allow humans to live on it. It was destroyed in M41.145 by an invading fleet of Chaos forces.It had very few resources or civilians on it at the time so its loss was not too great to the strength of the sector but for its economy, Gallius had brought in money as a tourist area in an otherwise quiet region of the galaxy.