It is assumed that the Legio Annihilator was itself nearly annihilated. Its current status since this campaign is unknown.
- Defence of Megyre (995.M41) - When the Forge World of Megyre was threatened by Hive Fleet Jormungandr in 995.M41, the Legio Annihilator was Megyre's last hope. Its mighty Titans boldly strode through the Tyranid horde, scattering the various bio-forms, but the Hive Mind was not so easily beaten. Not even able to celebrate their short-lived victory, the Legion’s Princeps were faced with a new threat. Resembling a Trygon, the massive Tyranid creature was the size of a Reaver-class Titan. This vile Bio-Titan rent through the ranks of the Legio Annihilator, first ripping apart a Warhound-class Titan without effort, then tearing a hole through the remaining war engines of the Legion. Nothing could stay the Bio-titan’s savage advance, including the war engines of the Legio Annihilator. It was only the mighty ordnance of the Basilica Mechanicus that possessed the fury to bring the beast down. Even then, the death throes of the monster tore great swathes out of the Basilica's walls, allowing for swarms of Rippers to flood into the complex and seal the fate of the doomed Forge World.
None listed in current Imperial records.
- Princeps Jonrah (KIA) - Jonrah was the princeps of the Legio Annihilator and died aboard his Titan during the Defence of Megyre.
The colours of this Titan Legion are not listed in current Imperial records.
The badge of this Titan Legion is not listed in current Imperial records.
- Codex: Tyranids (5th Edition), pg. 27