The Loac system existed within the Hocatar sector, which itself resided in the Slice region of the larger Expansion Region. It bore the same designation as the Galactic Civil War military endeavor referred to as the Loac Campaign.
The system of Loac made its initial appearance in the reference book The Essential Atlas, which was released in 2009 and authored by Daniel Wallace and Jason Fry; its location was specified as grid square P-12.