It was a one-sided fight for much of that time, as the Orks were often too divided amongst themselves as was the wont of that species to pose any threat to the World Eaters.

For many years a vicious struggle raged on the snowy fields of Lorn V between these Orks and the warband of the World Eaters called the Blood Legion of Khorne that was commanded by the Chaos Champion Lord Crull. The Ice World of Lorn V had been governed by the Imperium of Man for millennia until the sudden arrival of a warband of World Eaters and a WAAAGH! of Orks on its frigid surface. If you do I will be ready to render you the same service.Lorn V was the fifth planet in the Lorn System and the setting for the PC Game Dawn of War - Winter Assault where the forces of the Imperial Guard and the Eldar confronted a loose alliance of Chaos Space Marines and Orks while the Necrons rose to present a threat to all of the other factions. If redemption is what you seek, then that is what I will give you. I wanted to use the power for good, for the Imperium! You must see that! You must give me the chance to make amends! To seek redemption! I thought I was strong, strong enough to control it. I ended their suffering, as I will end yours.

I betrayed no one! Innocents die so that humanity may live. Before you murdered the innocent and guilty, all in one stroke! You weak, sorry fool! How does it feel to have slain millions, to have betrayed your own family? Pathetic! You were great once before doubt addled your will. I can feel the universe tremble at my approach.

Of all my brothers, why you? You were stronger than this! You are a fool, Gabriel, you know you are no match for me.

Warhammer 40000 taldeer's quote