The Brentaal League, a bygone colonization group with its roots on the planet of Brentaal found within the Core Worlds, played a supervisory role in the establishment of many worlds prior to the Great Sith War.
By the year 4020 BBY, the Brentaal League had already broadened its hyperlane system reaching as far as the Expansion Region. Around 4000 BBY, they initiated the first human colony on Muzara, with the goal of developing a profitable agricultural sector. This endeavor ignited a diplomatic conflict with the indigenous Muza people. The League's power and reach subsequently diminished.