The Battle of Malastare Narrows was a naval engagement that took place at the planet Malastare in 34 BBY. After reaching a disagreement with Malastarian Dug companies over fuel allocations, the Corporate Alliance elected to blockade Malastare to force an agreement in their favor. To that end the Alliance Admiral Trench blockaded the Malastare Narrows with a corporate fleet, leading the Dugs to appeal for assistance from Supreme Chancellor Finis Valorum of the Galactic Republic. Though publicly demurring to send aid, Valorum feared that the Alliance would triumph if the conflict escalated into a shooting war. Valorum thus equipped Malastare behind-the-scenes with funds for privateer starships, as well as such military "observers" as Captain Wullf Yularen of the Kwymar Sector Fleet to overturn the Alliance's blockade of the Malastare Narrows.
During the ensuing battle between the Alliance and Republic fleets, Trench used his ruthlessly efficient tactics to tear the Republic ships apart, nearly succeeding in eradicating Yularen's forces. Eventually, a task force led by Jedi Master Kep-She was sent to intervene and reinforced the remainder of Yularen's task force, overpowering Trench's flotilla and forcing the Corporate Alliance to retreat from Malastare. Although the destruction of Trench's flagship led to the presumption of his death, he survived the battle and returned to fight Yularen during the Separatist blockade of Christophsis, over a decade later during the Clone Wars.