The Homeworlds exiled Terrancriminals to Tethys to work as miners in the moon's harsh conditions with the promise of their eventually freedom. After the creation of Neosapiens, the mine was abandoned, leaving the prisoners to die rather than their promised freedom. The criminals survived by building bases, ships and constantly raiding the interplanetary commerce of the homeworlds for supplies. The convicts created the Pirate Clans and used Tethys as their primary base until the discovery of Chaos. During the Pirate Clans War, the Battle of Tethys ended in a stalemate when Exofleet withdrew due to the Neosapien War.