During the [[12th Black Crusade]], also known as the Gothic War, the [[Acheron Heavy Cruiser]] ''[[Chaos Eternus]]'' was destroyed in fighting over the agri world [[Numitor (planet)|Numitor]], having been tracked down by way of its unique engine energy signatures.{{Fn|1c}} Elsewhere in the sub-sector, the Imperial vessels ''[[Vanguard]]'' and ''[[Indomitus Imperious]]'' were crippled in a hit-and-run raid by a Chaos fleet over [[Halamnet]]; the decommissioned cruiser ''[[Admiral Drake]]'' survived only through the attackers' desire for a swift retreat.{{Fn|1d}}