The clash known as the Battle of Amarin occurred during the Pre-Republic era on the planet of Amarin. The combatants involved were the Kingdom of Cron, led by the Pirate King Xer VIII, and the Back Spiral.
After the defeat of King Ferece, Xer seized power and became the new King of Cron, initiating several military operations aimed at dominating the Tion Cluster. Having achieved total victory over the Kingdom of Cron, vanquished the Three Allied Kingdoms, and ultimately overcome the Back Spiral, Xer's Empire expanded to its largest size. Nevertheless, the Livien League remained a holdout against the Pirate King, and Xer VIII's attempt to subjugate them resulted in his defeat at Amarin.