The Terrawatt Clan was a polity of Terra during the Age of Strife. Said to spring from the same ideology that gave birth to the Martian Mechanicum, the Terrawatt Clan's Theologiteks rulers constructed great forges in the Ural Mountains. For most of the Age of Strife the Clan existed underneath the Urals, isolating themselves and few knew of their existence. When they did reappear, many Terran warlords came to them asking for their advanced weaponry and technology. However they listened to only one, the Emperor, as he shared with them technology that dated back to the Dark Age. In exchange for the technology he shared with them, the Terrawatt Clan provided the Emperor with many weapons he would give his forces during the Unification Wars.