It was completed in 21 BBY along with the other Venators Resolute and Dauntless. They were assembled together to act as a battle group and as their first mission, they were put under the command of Jedi General Anakin Skywalker.
Along with the other two ships, the Pioneer was sent to Bothawui to defend it from General Grievous. On the way to Bothawui, they had a couple of minor skirmishes with Grievous's fleet, but were able to reach it before they did. It participated in the Battle of Bothawui, when Grievous finally arrived there.
- The Clone Wars: Wild Space (First identified as Pioneer)
- Star Wars: The Clone Wars – "Downfall of a Droid" (First appearance)
- Star Wars: The Clone Wars – "Bombad Jedi" (Appears in flashback(s))
- Star Wars: The Clone Wars – "Jedi Crash" (Appears in flashback(s))
- Clone Wars Gambit: Stealth