I'm not sure if anyone can help but the Google & the Search function turned up with nothing.

A while ago (1 or 2 years maybe) someone posted a 40K timeline in the 40K background section. I remember it was a essay (author claims the project had been ongoing for 10 years) based on "actual" GW sanctioned events. However, the author took the liberty to fill in any gaps based on his knowledge of the fluff.

I know it sounds fanfic-y, but the author really did an exceptional researching and interpreting the 40K universe.

If anyone can provide me with a link to this article I would really appreciate it.