It was a massacre
Arseon was the 2nd planet in the Arsian System and was Partially-destroyed during the Battle of Arseon.
During the time of the Infinite Empire, Arseon was the site of the Battle of Arseon, which ended when the moon of Arseon, Oskak, crashed into the planet and made The Great Crater. The only way Arseon survived was the Infinite Empires technological defense machine.
The Image is BEFORE Oskak crashed into Arseon.