The Adumari Civil War took place in the year 13 ABY. It was a conflict between Cartann, the most powerful nation in the region, and a group of smaller nations including Yedagon. This Civil War held broader galactic implications due to external actors: the Imperial Remnant backed Cartann by deploying a unit from the 181st Imperial Fighter Wing, under the command of General Turr Phennir. Conversely, the New Republic aided the anti-Cartann Adumari coalition. This support began after General Wedge Antilles went against his orders and formed an alliance between Red Flight and the Yedagon Confederacy, influencing other states to accept General Antilles' leadership.
Ultimately, the Yedagon Confederacy and its allied forces achieved victory in the Civil War. The corrupt Perator of Cartann, Pekaelic ke Teldan, was removed from power and replaced by his son, who held more positive views towards the New Republic.