A stand-off in 2375 in which Colonel Kira Nerys used a handful of Bajoran ships to blockade the moon Derna after the Romulans secretly armed a hospital there with plasma torpedoes.
The blockade of Derna takes place in the Deep Space Nine episodes Image in the Sand and Shadows and Symbols. With Benjamin Sisko on leave, Kira commands the station and has to work with a new Romulan presence led by Senator Cretak. At Cretak's request Bajor allows the Romulans to build a hospital on Derna, an uninhabited Bajoran moon.
Odo then learns that the site has been ringed with thousands of plasma torpedoes. Cretak says they are there for defence and declines to remove them, and Admiral William Ross will not risk the alliance by intervening.
Kira places twelve small impulse ships between Derna and a group of warbirds bringing more weapons, and she refuses to move even though they could destroy her force easily. The Romulans hesitate, and Ross finally tells Cretak to take the weapons away or face Starfleet as well. The warbirds turn back and the torpedoes are removed.