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The '''{{PAGENAME}}''' was a class of [[Battleship]] designated as a '''Shield Bastion'''. It was used by the [[Imperial Army]]'s [[Imperialis Armada]] during the [[Great Crusade]] and [[Horus Heresy]].{{Fn|1}} Subsequently, the Tiamat Class served in the [[Imperial Navy]] at least up until the [[War of the Beast]].{{Fn|2}}  ==Known vessels==*''[[Dies Dominus]]''{{Fn|2}}

*{{Endn|1}}: [[The Horus Heresy Book Three - Extermination]] , pg.15*{{Endn|2}}: [[Echoes of the Long War (Novel)]], Chapter Two {{ImpShips}}