During the Imperial Era, the Imperial facility known as Sentinel Base operated its own flotilla. In 14 BBY, the Core Envoy, Sentinel's Imperial-class Star Destroyer, along with most of the flotilla's other capital ships, was away from the base escorting supply convoys to the planet Geonosis, where an Imperial battle station later known as the Death Star was being constructed.
While most of the flotilla was away, Sentinel Base was attacked by a rebel cell, with its only available ships being the spacetug Fremond, the frigate Salliche, and the Venator-class Star Destroyer Electrum. To deal with the attack, the base's commander, Moff Wilhuff Tarkin, used the Electrum.
Sentinel Base's flotilla first appeared in Tarkin, James Luceno's 2014 novel.
Sentinel Base's flotilla first appeared in Tarkin, James Luceno's 2014 novel.