Romulan Neutral Zone

The Romulan Neutral Zone was a buffer created following the end of the Earth-Romulan War between the and the Romulan Star Empire. Any entry into the Zone would be considered an act of war by either side.

In Star Trek: Arcadia, the Neutral Zone was finally abolished in 2382, with the rise of the Romulan Republic and signing of peace accords with the Federation.

The Neutral Zone contained several star systems and planets, both inhabited and uninhabited. One system was the location of the planet Horuulk. (Star Trek: Arcadia)