Cyrus Valtoor was a former Imperial Army General and Field Marshal of the Principality army. He was the commander of the 1st Army Corps based on Barida and would oversee the defense of the planet against the Empire's Task Force Nebula. Valtoor's defense of the planet was second to none; his skill and intelligence was unsurpassed on the battlefield. Nevertheless, he would lose to overwhelming Imperial superiority, and would be forced to retreat to Chiarn, where, during the Battle of Chiarn, he would surrender his army and accept imprisonment by the Empire.