AN: This is just for fun and if I miss anything help me find it and correct it, Also the Crons are just working with the Union because Why not :P. (They are not all the crons just a large group)
Chapter One - The Beginnings of a Union.
- History or Background lore -
Narration
"Human Speaking"
"Robot/Mechanical Entity Speaking"
"Eldar Speaking"
"Announcement"
Important
-"It is the Grim Darkness of the 41st Millenium and the Soldiers fight and die as usual, but an Inquisitor proposes an Alliance to protect the Galaxy Against the Younger and foolish Races against the Mistakes they have made. They Succeed and when an "Eldar-Human-Necron Battleforce" Disappears and is sent to a Different Time where the Darkness does not Exist but the Mistakes remain the same" -History of the Imperial Union-
Many do not know where or when it happened, but Inquisitor JosephH defied the Imperial code and spared several squads of Eldar with the condition, they return to their craftworlds and send a delegate Farseer to meetings go well and after many years of negotiations and considerations they combine forces.
Several years later they come across a Necron Tomb World that deny all C'tan with a Zealous fury ,only seen in the Death Korps or the Cadians, too serve the Void Dragon (Which is IN FACT Under Mars In the cannon) and The Necron forces reveal many technological wonders in an attempt to gain access to the Void Dragon's prison on Mars. It works and the Void Dragon is Awakened upon Mars' surface and the Necron forces Wish to Join the Union due to the Void Dragon wishing to Help Unite the Necrons then kill the C'tan being Called "The Deceiver" and are accepted in after several heated arguments from Human and Eldar Alike. The Union's Armies Agree to Help one another, Sadly for the Imperium of Man The Void Dragon has no Techno Wonder Or Care for the Emperor's Health for it was the Emperor's fault the Void Dragon was imprisoned in the first place. The Eldar Barely Accept the Necrons in joining the Alliance. As the Union Stands united Under the Flag of the Union (Each Symbol Remains the same, Just with Some Modifications to it) they have something they did not have in many many decades… They have hope that they will be able to stand united.
Later in the Union it's Forces Force their enemies out of their Territories. Later they enact "Free Travel" between all Eldar-Human-Necron Worlds. Even Later in that Decade they form the First Eldar-Human-Necron Battlefleet. It disappears After it's Second Warp jump due to a Combined Act by the Gods of Chaos and an Army of the Deceiver's Forces including a World Engine exploding causing an anomaly in the system in which an Attempt to Retaliate against the Union for Nearly Forcing their Minions to a standstill launches them From all they know, into a place where the Warp is Calm, a place where the galaxy fights with policies more than weapons.
This is where Our Story Begins!
-E.O.T.C-
Thanks to originalname412 for Telling me about the World Engine. Enjoy!, Also just figured out how to replace chapters :P