The B'omar Sovereignty was the political entity of the isolationist and paranoid B'omar race, located in the Delta Quadrant. The Sovereignty monitored every particle that entered their space, using a sophisticated perimeter grid, and dealt harshly with all intruders.
The Sovereignty reluctantly granted the Federation starship USS Voyager passage through their space in 2374, with the provision that it take a tedious and circuitous route through their territory. This agreement was voided after Seven of Nine stole a shuttlecraft and entered B'omar space in response to a Borg signal, and so Voyager was forced to take the three-month journey around B'omar space. (VOY: "The Raven")