Tydirium is the name of an Lambda-class T-4a shuttle of Imperial design. This vessel was commandeered by Nien Nunb, a Sullustan, from the Shieldmaiden, an Imperial-class Star Destroyer, as part of Operation Yellow Moon, a strategic distraction preceding the Battle of Endor. Subsequently, the Alliance to Restore the Republic utilized it to transport General Han Solo and his strike team to the planet Endor. Their mission was to disable the shield generator safeguarding the second Death Star.