By the time of the Battle of Anaxes in 19 BBY, during the Clone Wars between the Galactic Republic and the Separatist Alliance, a reserve fleet was part of the Republic Navy. During the battle on Anaxes, Jedi General Mace Windu stated to Jedi General Anakin Skywalker that he believed that the Separatists were to soon conquer the planet, speculating that the loss would compromise the entire reserve fleet.
This reserve fleet was first mentioned, albeit unnamed, in "The Bad Batch," the first episode of the seventh and final season of the Star Wars: The Clone Wars animated series. The episode aired on February 21, 2020, but was originally released on April 17, 2015 at Celebration Anaheim, and later on StarWars.com on April 29, in an unfinished story reel format as part of The Clone Wars Legacy multimedia project.
This reserve fleet was first mentioned, albeit unnamed, in "The Bad Batch," the first episode of the seventh and final season of the Star Wars: The Clone Wars animated series. The episode aired on February 21, 2020, but was originally released on April 17, 2015 at Celebration Anaheim, and later on StarWars.com on April 29, in an unfinished story reel format as part of The Clone Wars Legacy multimedia project.