Etran Harborage

The Etran Harborage, also known as Trove as a loose translation of its original name, and formally designated as Shield World 0459, was a Forerunner shield world located in the Korinth Prior system. A conservation sphere, it was intended to protect sentient lifeforms from the effects of the Halo Array and the Flood. It also served as a military outpost housing the Apex Site, a port for a fleet of Sojourner-class dreadnoughts.
Despite shield worlds being created as a haven from the Halos and the Flood, the external surface was heavily infested with Flood biomass, with forms of various types freely roaming across the surface. Sentinels were a rarity on the outside, but this changed within the center, where the many Forerunner constructs worked to prevent the Flood from claiming the interior as well.