Romulan Neutral Zone

The  used to be a buffer zone between the United Federation of Planets and the Romulan Star Empire. The zone was established after the in 2160, and any trespassing could be considered an act of war.

Although the Romulan Neutral Zone had still been in existence by at least the year 2400, neither any missions nor the in-game Beta Quadrant-map make any mention of it.