The Battle of the Alaxxes Nebula was an engagement that took place between the bulk of the Space Wolves fleet and the bulk of the Traitor Alpha Legion fleet within the vast, highly corrosive dust and hyrdrogen ice cloud fields of the Alaxxes Nebula in 007.M31, during the early years of the Horus Heresy. As the Space Wolves were still licking their wounds following their heavy losses during the Razing of Prospero, they are ambushed by a sizable Alpha Legion strike force and are subsequently routed at Yarant. Primarch Leman Russ organised a tactical retreat and fled towards the Alaxxes Nebula to seek temporary sanctuary. The Alpha Legion gives chase and soon the VIth Legion soon found themselves in a precarious predicament and were effectively cut-off and surrounded by the bulk of the Alpha