Fire Emblem Fates

Negantria was once a continent ruled by those called the First Dragons. Each of these dragons fought fiercely for control over the world they commanded. As time passed, their bodies grew wary and began to succumb to their injuries. One by one, the dragons fell, their corpses left to rot. Before they died, the dragons each bestowed their blood to a human of their choice. Some of these humans died in the effort to guard their dragons from the other, but some survived and formed a nation for themselves. As time passed, the few First Dragons that remained abandoned the world they had created. Left with little more than the land on which they stood and the memories of the war, humans managed to create a society that would be split into two nations called Hoshido and Nohr, each of them entirely separate from the other.At least, that was how the legends put it.