Border
A border was a division line set between two political powers, groups, or races.

The Glyrhond River was a natural border between two rival Bajoran groups, the Paqu and the Navot, until the Cardassians changed its course during the Occupation. ()

The Cardassian Union closed their borders in early 2372, due to the civil unrest on Cardassia Prime and the threat of infiltration by the Founders of the Dominion. ()

Several weeks after the Klingon Empire withdrew from the Khitomer Accords, they began to look for weaknesses in the star systems along their borders. ()

Notable borders 
Both the Romulan Neutral Zone (between the Federation and Romulan Empire) and the Demilitarized Zone (between the Federation and Cardassian Union) each had their own "side" of the border. 

 Borderland, region between Klingon and Orion space
 Cardassian-Romulan border
 Federation-Cardassian border
 Federation-Klingon border
 Federation-Talarian border
 Federation-Tzenkethi border
 Klingon-Romulan border
 Niwray Border
 Vulcan border

See also 
 Border Incursions of 2112
 Galen border conflict
 Romulan Neutral Zone
 Border protection grid

External link 
 

nl:Grens
 Border