Green Hills was an outer colony.[note 1]


Along with Second Base, Green Hills was one of two colonies lost directly after Harvest in 2526. Initially, the UNSC had hoped to cover up their loss by explaining it away as a communications blackout caused by Insurrectionists. Eventually, they revealed that the UNSC was now fighting a xenocidal alien hegemony, and that this and another colony had been destroyed with the total loss of two million civilians between them.[1]


  1. While never directly stated as an outer colony, the fact that it was lost 2526 (very close to the loss of Harvest and way before the 2536 date for the breach of the inner colonies), it can be assumed that it is an Outer colony.


  1. Halo Wars: Genesis - page ???