The blockade of Derna

Tachyon detection network activated

Display graphic depicting the Picard's blockade on the Klingon-Romulan border

A blockade was a fleet maneuver intended to disrupt enemy movements, specifically supplies. Blockade runners were designed to evade such actions.

In 2256, during the Federation-Klingon War, Starfleet maintained a blockade to protect the strategically vital planetoid Corvan II. Six months into the war, Klingon forces ambushed the blockade, leaving the planetoid open to attack. (DIS: "The Butcher's Knife Cares Not for the Lamb's Cry")

One of Kyril Finn's demands in 2366 was a Federation blockade around Rutia IV. (TNG: "The High Ground")

During the Klingon Civil War in 2368, Captain Picard implemented a blockade of the Klingon-Romulan border to prevent Romulan supplies from reinforcing the Duras-led faction. A tachyon detection grid was used to overcome the Romulan starships' cloaking devices. (TNG: "Redemption II")

The following ships comprised Picard's blockade:

In 2375, Colonel Kira Nerys established a blockade around Derna to stop the Romulan Star Empire from bringing its plasma torpedo launchers on the Bajoran moon online. (DS9: "Image in the Sand", "Shadows and Symbols")

Annari scanning pulse

Annari ships blockading the Kraylor homeworld

In 2374, the Annari began a blockade of the Kraylor homeworld, unable to attack the planet itself due to a shield. In 2377, Harry Kim and Seven of Nine helped Kraylor scientists break the blockade with a newly-developed cloaking device onboard the Nightingale. Although the blockading Annari ships were equipped with scanning pulses capable of revealing a cloaked ship, the Nightingale broke through the blockade. (VOY: "Nightingale")

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