Who: YOU. Where: By the cove. When: Day 230, just after game start What: An announcement by a kid with one arm and the title: Overlord. :)
Gather around, peons. You'll never get an offer better than this one. For today only, you have the option to lend your support to the soon-to-be ruler of Sabra la Tau.
All you have to do is do as you're told, and you'll be safely on the right side when the conquest begins.