Seheron, the largest island in Thedas, is a humid jungle nation in the Boeric Ocean, directly north of the Tevinter Imperium. Seheron had been in the possession of the Tevinter Imperium from its earliest days, and its architecture reflects the long occupation of the Imperium. However, after successfully claiming Par Vollen in 6:30 Steel, the Qunari turned their attention to Seheron and landed on its shores in 6:32. After ten years the Qunari had not only taken the island from Tevinter entirely but also occupied a significant portion of the mainland Imperium. The Qunari were eventually pushed back from the mainland and entrenched in Seheron. The Battle of the Nocen Sea followed and proved to be the largest naval engagement in recorded history, ultimately leading to a stalemate between the warring countries.

The battle in 8:55 Blessed leveled much of the architecture and infrastructure. Large portions of the island remained outside of Qunari authority. The native people of the island not under Qunari rule came to hate the Imperium as much as the Qunari due to the violent and long-lasting warfare and the toll it had taken on the island. In spite of this dissent, many inhabitants have taken willingly to the Qun as it offers an alternative to the oppression of Imperial rule, particularly to the large population of former elven slaves on the island. Many of those elves now hold high office within the Qunari ranks, helping the invaders oust their old masters.