Sunaion

Sunaion is a city on the Sangheili homeworld of Sanghelios. The city is situated above an ocean on Sanghelios kept up by large columns.

Covenant occupation
By 2558 Sunaion had been captured by the Covenant and turned into a major stronghold.

Battle of Sunaion
Sometime in 2558 Sunaion was attacked by the Swords of Sanghelios in an attempt to end the Covenant. At some point in the battle Fireteam Fireteam Osiris was deployed into the city by Thel 'Vadams Lich and were tasked with locating the AWOL John-117 who was on a Guardian construct near the city. However the Warden Eternal stopped them from getting to it.

Appearances

 * Halo 5: Guardians