Jaska was a female FalleenJedi Knight who eschewed Jedi teachings for Mandalorian culture during the Mandalorian Wars. Believing that the Galactic Republic was corrupt, she became a member of Jedi MasterDorjander Kace's Mandalorian Knights, a rogue faction of the Jedi Order who sought to help the Mandalorians win the war and become better rulers of the galaxy with the guidance of the Jedi. Joining the Revanchist movement, an organization of Jedi who aided the Republic war effort, Jaska and the Mandalorian Knights participated in a battle on the planet Essien in 3,962 BBY. During the engagement, Jaska and her fellow Knights were able to use deception to lead the Phaeda militia, the unit under their command, into Mandalorian captivity and seize the Republic command ship, the Axehead frigate Reciprocity. After successful attacks on the planet Halthor and the space station Phaedacomm, Jaska followed Kace in the final step of his campaign the capture of Jedi trainees on the planet Dantooine, with the purpose of converting them into future Mandalorian Knights. Jaska and the Mandalorian soldiers attacked the Jedi Enclave on Dantooine. However, Kace's plans were foiled by the Phaeda militia, and particularly by former Jedi PadawanZayne Carrick. Jaska and the Mandalorian Knights were captured and faced public trial for their treason against the Galactic Republic.