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")

In 2259 of the alternate reality, Admiral Alexander Marcus ordered all ships near Earth to be parked in a blockade formation to prevent "John Harrison" from leaving the area. This would be followed by the deployment of search vehicles and landing parties. (Star Trek Into Darkness)

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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