Saturnyne Recovery

The Saturnyne Recovery was an Imperial expedition undertaken by the Midnight Claws Space Marine Chapter at the behest of the Adeptus Mechanicus to help recover some ancient patterns of Tactical Dreadnought Armour upon a long-dead forge world. Thinking the planet was devoid of life, initially, the quest went without a hitch. However, as the Astartes made their way further underground, they encountered untold numbers of Tyranid bioforms, forcing the Chapter expeditionary strike team to withdraw, but not before they saw the death of over two-dozen battle-brothers.

History
The Midnight Claws' 7th Company received a message from the High Lords of Terra that the chapter must retrieve a batch of recently discovered, ancient Saturnyne pattern Terminator suits from a long-dead forge world that had been left devoid of life after a Tyranid attack. Initially, the area seemed secured at first but remaining tyranid bioforms, now devolved into beasts forming the planet's wildlife, attacked the company left, right and center. Their ferocious assault was launched from the second of the Midnight Claws arrival, leaving them with the tragic loss of 35 battle-brother, each of whose gene-seed and wargear were unrecoverable.