Wheel of Fire Campaign
By this point in the Crusade, only Horus, Leman Russ, and Ferrus Manus had been rediscovered by the Emperor. The battle was waged by the Space Wolves Legion, still consisting of many Terran recruits, against billions of Orks within the Wheel of Fire Subsector. After a bloody five year campaign, the Orks were annihilated but a third of the Space Wolves were destroyed.
In the aftermath of the campaign, Russ was given two gifts. The first was the construction of The Fang by the Chamber Castellanis and the second was the Spear of Russ, which was given to Russ by the Emperor personally.