The Tularan Marsh, located on Taris, originated as a swampland at the location of several disused swoop racing circuits. By the year 3643 BBY, this area had evolved into a full-fledged marsh, providing habitat for creatures such as k'lor'slugs, nexu, ferrazid hounds, and bogwings. In proximity to the marsh, the Republic restoration project established a pair of research outposts, while a pirate encampment was situated to its south.
During the era of the Cold War, a wandering protagonist journeyed to the marsh's eastern boundary, assisting Tarkos Sund in retrieving the prototype accelerator that Revan employed to triumph over Brejik in a swoop competition.
After the Sith Empires Invasion of Taris, the Tularan Marsh served as one of the final locations on the planet where Republic forces, under the command of Major Kamden, mounted coordinated, albeit ultimately unsuccessful resistance against the invading forces.