The Battle of Beta was fought between the Galactic Empire under the leadership of Emperor Greyson Uebles and Falleen Federation under Lord Commander Zechs Darius in late Year 5. Under King Eldrik Kuraine, the Falleen Federation had achieved a number of victories against the Galactic Empire, notably capturing the Imperial Star Destroyer Shadowstone. An uncharted system, Beta was first discovered during the search for Grand Admiral Gorn Veynom. Since that time it had become a major stronghold of Kuraine, dominated by the massive spacestation Libra. An estimated three billion sentients lived on the main planet of Ul Yanin.