Exxilon

Exxilon was an ancient planet which was inhabited by a large rebel army of Sangheili who opposed to the traditional Sangheili ways. Exxilon was a barren planet, covered in deserts, sand dunes and rocks. The seas had dried up, leaving behind few lakes. It was bitterly cold during the night and unbearably hot during the day. There was nearly no life on the planet except the rebel Sangheili.

History
A small rebel Sangheili army landed on the planet in the year 2541. They then decided to mass a larger army to one day return to Sanghelios and take control of the population and planet.

During the build of the larger rebel army, in the year 2543, there was heresy within the rebel army. This unfortunately revealed the location of Exxilon and where they were to the leaders of Sanghelios whom sent out the Blades of Destruction fleet to exterminate them. This would be the first time in a few years that the rebel Sangheili army would have seen any conflict giving the incoming Blades of Destruction fleet an advantage.