The Alien Wars are a series of conflicts that occurred before the rise of the Imperium. Titans were used as war engines that fought in the first Alien Wars.[1] The first Alien Wars began during the Dark Age of Technology sometime between M18 and M22 when warp travel was possible for humanity.[2]
Source
- 1: Codex Titanicus (1st Edition), pg. 6
- 2: Deathwatch Core Rulebook, pg. 290