Peto Kelsan was a Human male officer in the Imperial Navy who pledged his loyalty to Darth Krayt when Emperor Roan Fel was ousted from the throne by the Sith Lord in 130 ABY. Holding the rank of admiral, Kelsan was placed in command of the Coruscant Third Fleet. By the year 137 ABY, Kelsan and his command were stationed at Ralltiir, a Core World significant for its status as one of the great financial centers of the galaxy. That year, Ralltiir came under attack; elements of the Galactic Alliance Remnant—the previous galactic government, toppled by the Sith and Roan Fel while they had been allies—engaged Kelsan's command. The Galactic Alliance forces, led by Admiral Gar Stazi, were shortly thereafter reinforced by the Bastion Second Fleet, commanded by Edouard Fenel of Fel's Empire.