The Skirmish in the Upestis system occurred in 3,956 BBY, at the height of the Jedi Civil War. Taking place in the uninhabited Upestis system, the engagement began when the Sith Interdictor-class cruiser Wrangler, captained by the Dark Jedi Xaset Terep, dragged a patrol of Republic Navy warships out of hyperspace near the system's third planet. Aided by Bastila Shan's battle meditation, the force of two Hammerhead-class cruisers, the Endar Spire and Feldnar Spire, along with the twelve Aurek-class tactical strikefighters of the 37th Starfighter Squadron, were able to fight off the enemy Sith interceptors and deal enough damage to Wrangler to force a retreat.