USS El Dorado
From Star Trek: Theurgy Wiki
The USS El Dorado was a 24th century Federation Defiant class starship operated by Starfleet.
During the Dominion War, the USS El Dorado rescued a Gorn servitor named Sithick from a Klingon escape pod that was jettisoned from the IKS Roc’Tar before its destruction. The officers and crew of the El Dorado gave the refugee basic Starfleet enlisted training before dropping him off at Black Opal Station.
After the USS Theurgy discovered the conspiracy that compromised Starfleet and fled Federation space, the El Dorado was selected to be part of Task Force Archeron and ordered to hunt down and destroy the errant multivector dreadnought.
In March of 2381 the El Dorado was disabled by Lieutenant Commander Carrigan Trent's "Soup Sandwich" virus, but a week later had recovered sufficiently to participate in the Battle of Starbase 84.
Later in March of 2381, it was searching for the Theurgy in the Azure Nebula when it - along with ten other ships in Task Force Archeron - encountered the Borg. They fought valiantly in protection of the Federation, meaning to halt the invasion, until the ship was destroyed. The crew of the USS Allegiant NX-80978 found parts of its wreckage on their sensors, scanning the debris field left behind after the battle.