Sometime after the launch of humanity's first manned interstellar colonization effort a grub named Traveling Fearlessly was drawn to the fleet. Compared to the engine capability of its own "void warren", they appeared to be crawling toward the 61 Cygni A system. However, Traveling Fearlessly was concerned about the long-term ramifications of the emergence of an interstellar civilization in local space; particularly the potential to drawn Inhibitors. To determine whether a peaceful -- communication of the existential threat -- or violent -- summary extermination -- solution was ideal, it began trailing the armada and observing.
Unfortunately, one of the five ships, the Islamabad, was destroyed in a sudden and unexpected antimatter explosion. The blast wave crippled Traveling Fearlessly's void warren and killed numerous helper grubs -- organisms tied directly into both the larger grub and the void warren, whose deaths negatively affected both.
Still drifting behind the Flotilla, the virtually helpless void warren was eventually detected and boarded by a crewman of the Brazilia: Lago. Arriving secretly by shuttle, piloted by fellow crewman Oliveira, Lago entered the alien craft and was eventually "eaten" by Traveling Fearlessly, after panicking and killing several of its helper grubs. It actuality his memories were absorbed by the grubs and his biological components appropriated for other uses. After the traumatizing killing of his friend, Oliveira killed himself.
Years later Sky Haussmann, along with fellow crewman Gomez and Norquinco, also located the famed "ghost ship". After discovering the fate of the two Brazilia crewman, and the presence of two more shuttle on the way toward his prize, Sky knew he could not keep it a secret for long, and decided to destroy it -- and kill Traveling Fearlessly -- rather than risk its technology falling into the hands of other Flotilla ships.
After forcing Traveling Fearlessly to use its vessel's force-projection technology to destroy the two approaching shuttles, he detonated a harbourmaker nuke inside the void warren.