The Unicomplex was a vast Borg complex located within Borg space in the Delta Quadrant. It was composed of thousands of connected structures and hubs that housed hundreds of Borg ships and trillions of drones. (VOY: "Dark Frontier")
- It is unclear at this time whether or not there is more than one Unicomplex as only one has been seen on screen, in Dark Frontier. While the events of Voyager's return to Federation space (VOY: "Endgame") involved a major reduction in Borg assets, it is possible that those events did not include the destruction of the Unicomplex seen in Dark Frontier.