The creation of the Leeran Alliance was a direct reaction to the Leeran Campaign, during which the Kartanin Dominion conquered multiple independent systems once belonging to the Leeran Empire. Fearing for their independance, several worlds formed a military alliance and prepared to defend themselves against the overwhelming Kartanin Warfleet. However, before the two opponents ever met on the field of battle, the offensive was suddenly halted. When the alliance learned that the Kartanin fleet was being partially recalled to lend aid to the Black Star Confederacy, they sent emissaries to the Ancathra System, and successfully negotiated a truce.