Xaart was a ground soldier who fought under Meetra Surik's leadership during the Battle of Dagary Minor. This battle was an early defeat for the Galactic Republic at the start of the Mandalorian Wars. Having fought in those wars, Xaart later worked as a secret diplomatic agent, acting on instructions from the Galactic Senate. Xaart's communication with Surik was severed until after the Jedi Civil War, when he reappeared on Onderon in 3951 BBY. There, he was a clandestine Republic investigator in the capital city, Iziz.
Surik initially underestimated the significance of Xaart's assignment to the destiny of the galaxy. He concluded that Onderon's successful secession from the Republic would encourage enough nearby systems to join, which would eventually lead to the Republic's demise. However, this information became irrelevant when Onderon descended into civil conflict.
Even though he was marooned on the planet following the wars, Surik assisted him in acquiring a visa to facilitate his return to his home planet.