I IZ TEH UNKNOWN PRIMARCHS

Fact.

I am also an admin/bureucrat on Space Marine Wiki by virtue of starting this thing way back. Ask me if you have questions related to this lofty position and the powers it grants. Or 40K stuff I suppose.

For fluff (40K word for backstory) resources, I recommend visiting or searching the Warhammer 40K Wiki and the Lexicanum websites