Arborea

"Served two tours on Arborea: one against rebels, and the other against the damned Covenant. It used to be a nice world, too."

- Anonymous

Arborea is a modest colony world under the control of the United Nations Space Command that is located in the first rim. By 2535, it boasted an estimated population of nearly thirty million Human individuals.

In 2535, it would be the site of an unsuccessful defensive stand against invading Covenant forces. As it was only partially glassed (approximately one fifth), terraforming crews successfully restored its ability to sustain life by 2572.