Several centuries later, Sector Command founded Port Wander, a heavily-armed voidstation to serve as a staging ground for Navy operations along the Halo Margins. Navy presence soon dwindled as unrest drew the Battlefleet Calixis' attentions elsewhere, and the station came under the control of miscreants and Rogue Traders. Even so, when the Rogue Trader Purity Lathimon finally discovered the nigh-mythical Koronus Passage through the Great Warp Storms into the Expanse, Battlefleet Calixis set a watch on this gateway to the Halo Stars. The first Passage Watch Est was led by Terrich Voyle, who commanded the force from the Gryphon, his grandfather’s old flagship.