Aegon's Conquest takes place hundreds of years before Game of Thrones, following the aftermath of the Doom of Valyria that left the Targaryen exiles with no home to return to. With access to the last surviving dragons in the world, the Targaryens have the opportunity to face off against a divided Westeros with practically no defenses. At the head of the three Targaryen dragons, Balerion stands the tallest.