Sunaion

Sunaion is a Sangheili city located on Sanghelios. It is built above one of Sanghelios's oceans.

History
Sometime in 2558, there was an engagement between the joint forces of the Swords of Sanghelios, the United Nations Space Command and Jul 'Mdama's Covenant faction. Fireteam Osiris, led by Jameson Locke, took part in the operation and aided the Swords against Jul 'Mdama's forces. It was considered the last stronghold of Jul 'Mdama's Covenant faction on Sanghelios. While aiding the Swords in capturing the city, Fireteam Osiris sought out John-117 and the Guardian he was searching for. However, they were soon blocked from going further by the Warden Eternal

List of appearances

 * Halo 5: Guardians