Battle of the Iron Field

The Battle of the Iron Field was a joint-campaign that was a part of the wider Indomitus Crusade, fought between the allied forces of the Ash Scorpions Chapter and the a Tau of the LarkTa Sept on an unnamed world against the Heretic forces of the putrescent Death Guard Traitor Legion. Though the two allies managed to put up a respectable defence, in the end they were forced to abandon the doomed world to the whims of the Plague God Nurgle after sustaining severe casualties during the fighting.

History
This was a desperate battle fought against the forces of the vile Death Guard by the Ash Scorpions. They fought alongside Tau of the Lark'Ta Sept deploying the Chapter's 3rd Company, but during the fighting it was badly mauled and the allied forces were forced to abandon the world to the Death Guard. Eighty-one Astartes were confirmed to have fallen during the fighting along with over 4,000 Fire Warriors, but the most telling casualty was the Captain of the 3rd Company, Valtus Gunther, who was killed whilst directing the retreat.