Bioware recently updated the official Dragon Age website, adding history of The Grey Wardens and The Darkspawn.
The history seems to be taken from a fictitious book called Ferelden: Folklore & History written by Sister Petrine, a scholar of the Chantry.
The history talks about how the first Grey Wardens were created, 90 years after the first Blight started upon the arrival of Archedemon Dumat. Dumat was originally one of the seven Old Gods of Tevinter.
He was also the first one to be corrupted and become an Archedemon, followed by three others while the rest hid in shadows.
Grey Wardens were a group of veteran fighters, hardened by years of countless battles. Their campaigns against the Blight caught the attention of other nations of Thedas. The Wardens aided by the armies of other nations, fought Dumat in the Silent Plains.
They were victorious but suffered heavy losses, Dumat maybe dead but the struggle of the Grey Wardens continues until all the Archedemons are dead.
According to the chantry scholar, the origin of Darkspawn is still unknown; many believe they are created out of nothingness in the darkness. The darkspawns spread throughout Thedas but were somehow kept away from Ferelden.
As can be seen here, Bioware really works hard on the lore of their games which is one of the main reasons Dragon Age series is loved by fans.
Dragon Age: Inquisition, the 3rd title in the franchise is set to be released on October 7th 2014 on PC, PS3, PS4, Xbox 360 and Xbox One.