Harron Tavus was a human male lieutenant and later commander in the Republic Special Forces who fought in the Great Galactic War. He was friends with and fought alongside Jedi Orgus Din during the offensive in the Minos Cluster. Tavus was present when the reconstituted Sith Empire attacked the capital world of Coruscant and again fought alongside Din to repel the invaders, though they were ultimately unsuccessful. After the Treaty of Coruscant was signed, officially ending the war, Tavus accompanied Din on a diplomatic mission to Balmorra, during which they rescued Satele Shan and SP-99 from an adrift escape pod.
As cold war skirmishes engulfed the galaxy Tavus, at that time field officer of the Havoc Squad, began to lose faith in the Galactic Republic. He was stationed on Ord Mantell during a violent civil war, fighting the Imperial backed Mantellian Separatist Movement, where he and his squad prepared and carried out their defection to the Sith Empire.