The "Eras" of 40k history...

The Age of Strife - The events that took place to create this and the unique reactions in the Anargo sector.

"With the closing of warp channels to the <insert name> sector, and the loss of imports resulting, the Anagro council elected to use what warp-capable ships were available to search for possible colonies which could make their conglomeration of worlds more self-sufficient. However, with the unexpected opening of another warp storm the ship sent to investigate a possible colony near the Medresis nebula suffered severe damage on exiting the warp, loosing the gellar field and having to eject two of the three plasma reactors. Being unable to leave and with limited power, the ship's captain elected to land and make the best of the situation before the ship's systems deteriorated any further."

The Great Crusade - The Emperor's expansion and reclamation of the former human volumes of space.

The Emperor himself once stood upon the Shrineworld, and it was the first world in the sector upon which an Imperial outpost of any kind was emplaced during the crusade.

The Age of Apostasy - As with the Horus Heresy, what happens in the Anargo sector during this period?

I'm going to have to put some thought into this one as well, as it's going to have some profound efects on the Shrineworld. I'm thinking of having the Mechanicus sever all ties with the Ecclesiarchy at some point during this time (towards the end of the Reign of Blood probably), hanging the Shrineworld out to dry to some extent and causing major prblems.

That sounds very interesting indeed, MvS. What do you mean by history production bible though?

And keep in mind that the "bible" should not contain any of GW's official fluff, like the thrice-damned Fluff Bible
In fact, we should probably think of a new name alltogether

Oh, and welcome to the project ;D

Welcome MvS... always nice to see new blood and that broad interest in the project expands to new frontiers, as it were.

Any work would be of interest, although clarification of what you mean by "...and a few 'fill-outs' of areas that have only been skated over just yet..." Not saying that you're wrong since there are obvious areas that haven't been addressed, but thought that I would ask for clarification.

Perhaps it would be best to start up a separate thread, however?

Kage

You don't have to apologise for taking so long between posts. None of us seem to really have as much time as we'd like for this project anyway

On the areas that you can contribute, I think zholud and Kage mentioned the most important ones.

- War in heaven. As zholud says "The local conflict between Old Ones, Eldar and Necrons which caused existence of Cursed sub-sector special peculiarities – black hole, dead stars, lots of asteroids and other result of very old and very massive war. The resulting rumours about this sub-sector being ‘cursed’. We still work on the exact matter what causes ‘curseness’"
And of course, the Necron Tomb world, and maaaybe the warp race Aoideans that guard the Tomb world...

- The shaping of Anargo, Age of Strife to Great Scouring (Post Horus Heresy). What was the Anargo sector like before the Great Crusade, and what happened in the Anargo sector during the Great crusade, when the Emperor and his Custodes arrived? Especially interesting would be the rivalry between the Imperial Armies (later Imperial Guard) and the Alpha Legion companies deployed here, with everyone trying to impress the Emperor. History would show that the Imperial Armies fought as splendidly as the mighty Space Marines themselves, earning them a visit from the Emperor themselves. I would like to read about how Alpharius reacted when the Emperor almost neglected the Alpha Legion in favour of the brave Imperial Armies. Perhaps show the vulnerable and human side of the Primarchs, and show what kind of episodes led to the fall of the Traitor Primarchs.

- Age of Apostasy - The relationship between the Adeptus Mechanicus and Ministorum, the changes that Vandire's reign brought with it, and the war concluded the Age of Apostasy in the Anargo sector, and led to the total destruction of the 'cursed subsector'.
Check out this link for my previous suggestion for the Age of Apostasy

-Zholud's suggestion about inventing new cults could be interesting, but only if it's something very unique and original. We've all read about hundreds of cults before, I imagine, so reading about another arch-typical Slaanesh cult isn't very interesting.