Erathia is a kingdom on the continent of Antagarich in Enroth. It is ruled by Gryphonheart dynasty, and it is inhabited mostly by the humans of Castle town. Its capital city is Steadwick. Most of the campaigns in Heroes of Might and Magic III - Restoration of Erathia and its expansions Armageddon's Blade and Shadow of Death takes place in Erathia.
The nation was founded by Rion Gryphonheart during his uprising against the Barbarian King Tarnum. The throne remained in the hands of the Gryphonheart dynasty until Queen Catherine married Roland Ironfist of Enroth. Queen Catherine Ironfist(Gryphonheart) unfortunately stepped down as the Queen of Erathia during the final events of Armageddon's Blade, therefore she no longer had authority to command her father's kingdom. Later, however, the throne fell to Gen. Morgan Kendal, the highest General in Erathia and the commander of the Royal Erathian Military Command. after the murder of King Nicolas Gryphonheart. The entirety of Erathia was ruled, commanded, and led by General Morgan Kendal, who later became a regent and was also the last ruler of the kingdom of Erathia.