The story of the Founding Wars is a myth about a battle that took place during the creation of the planet of Nirn, and included the three Titan brothers, The Titan of Nirn, The Titan of Nemedia and The Titan of Naur as well as The Titaness of Vilya.
The planet of Nirn began as a large, oval shaped slab of rock with very few living creatures on it. Having been found by The Titan of Nirn first, he began to create more life there, developing forests and fertile ground. The Titan of Naur on the other hand, who always had carried a grudge against his brothers, decided to envelop the planet in flames and create a desolate wasteland, watching as those few creatures who lived there struggle for survival while fighting the minions of Naur, such as demons and imps. He began scorching the planet, especially towards the south, burning all that his brother had created. Nirn called upon his brother, The Titan of Nemedia who brought with him the power of water and the sea, as well as The Titaness of Vilya, and together they fought The Titan of Naur.
The three finally defeated The Titan of Naur, and banished him below the earth, in the core of the planet. The three then proceeded to create more life on the planet, and developed it into the vision Nirn had originally held. The three Titans later decided to retreat, and decided to allow the life they had created to control the future of the planet. Once Nirn and Vilya became lovers though, Nemedia decided to travel back to the planet they had created, because he too was in love with Vilya. He decided to retake control of his share of the planet; the Nemedian Sea, taking his resentment for his brother out on the life they had created in the world of Nirn.