Warleader G'Sten was G'Kar's uncle and leader of the Narn assault on Gorash VII in 2260.
Narn intelligence had shown that the base was lightly guarded and seemed to be the prefect target for a military strike. Lord Refa made sure that a fleet of Shadow vessels were guarding Gorash while the Centauri fleet headed to the Narn home world.
He was killed by the Shadows when the entire Narn fleet was wiped out in orbit around Gorash. [1]