Federation-Cardassian border
The Federation-Cardassian border (often referred to simply as the Cardassian border) was the division between the United Federation of Planets and the Cardassian Union in the Alpha Quadrant. For several years in the 2370s, part of the border was included in the Demilitarized Zone. (; ; )

Cardassian star systems on their side of the border included the Unefra system and Chin'toka systems. ()

Prophet's Landing was the closest Bajoran colony to the border. ()

In 2370, Commanders Benjamin Sisko and Calvin Hudson were the two highest ranking Starfleet officers stationed near it. ()

Later that year, the  and  were dispatched to the Cardassian border after the illegal capture of Miles O'Brien by the Cardassians. () Shortly thereafter, the  was on a patrol of the border. ()

Several Federation starships disappeared near the border after the Cardassians joined the Dominion in 2373, including the .  ()

In late 2373, General Martok took the  on patrol near the Cardassian border, to provide advanced warning of a Dominion fleet heading for Deep Space 9. ()

In early 2374, a captured Jem'Hadar attack ship commanded by Benjamin Sisko encountered and was attacked by the  on the Federation side of the border. Sisko hoped that by crossing it, Captain Reynolds would not pursue them, but the Centaur crossed the border and continued its attack. ()

Later that year, after Operation Return, the  was destroyed near the border. Captain Sisko commented, that patrolling the Cardassian border was becoming more and more dangerous, since a starship could always run into a squadron of Jem'Hadar fighters. (

See also 
 Demilitarized Zone

fr:Frontière Fédération-Cardassia
Cartography
Federation
Cardassia
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