location = Sarlona end = 1,000 years ago start = 1,500 years ago aliases = Le Fractionnement of Sarlona combatants = Borunan, Corvagura, Dor Maleer, Khalesh, Khunan, Lamecha, Mae Khree, Nulakesh, Ohr Kaluun, Pyrine, Rhiavhaar, and Sunyagir victor = The Inspiré of The Unity of Riedra

Le Fractionnement was a five-hundred-year period, where wars between the city-states known as Les Douzes Kingdoms threatened to engulf all of Sarlona.

Le Fractionnement first began one-thousand-five-hundred years ago, when the birth of the first Kalashtar of Adar turned the gaze of the Quorien of the Rêve Obscur to Sarlona. The conflict of the dreams entities of Dal Quor bled into the waking world of Eberron.

Les Douzes Kingdoms that inhabited the lands of what are now modern-day Riedra and Syrkarn warred amongst each other for two hundred years.

The conflict between Khunan, Lamecha, Mae Khree, and Sunyagir was one of the first of Le Fractionnement. These magewars between the four nations gave rise to the Yuan-ti and the nation of Syrkarn. This might have been related to the release of an Overlord bound beneath the city of Sustrai Mor that gives the land its modern name, Syrkarn.

After two hundred years of conflict, the Quorien completed their manipulation to create the first of The Chosen. The Quorien made use of careful manipulation to scapegoat forces such as the Yuan-ti, Shulassakar, and ogre mages within Les Douzes kingdoms to unify most of the continent under their rule. These Inspiré representatives of higher powers stepped in and began the process of unifying eight of the kingdoms under a single faith and flag, that of the Chemin de l'Inspiration and The Unity of Riedra.

Many residents of the continent escaped from Sarlona to avoid this upheaval, to lands including Adar, Khorvaire, and Xen'drik.

The ending of Le Fractionnement was heralded as the start of the Age of Unity.