From Halopedia, the Halo wiki
By 2517, she had been captain of a cargo ship for fifteen years. Prior to this, she had served as a first officer for nine years, and as a navigation officer for ten years. Over her career, none of the ships she served on had been boarded.
On September 24, 2517, however, when Dartmouth arrived at the Eridanus system, the ship was intercepted and boarded by the local cell of the Insurrectionists, under the personal command of Colonel Robert Watts. The captain requested escort from the frigate Journeyman and asked Amtower to continue their course for Eridanus II. She and her bridge officers, McNally and Welke, then attempted to repel the boarders with M45 Tactical Shotguns. The crew was quickly gunned down by the rebels.
List of appearances