A group of stormtroopers, a battalion in size, served under the command of the Inquisitor known as the Fifth Brother while they were hunting for the Jedi Master Obi-Wan Kenobi. The Fifth Brother gained an advantage in the pursuit of Kenobi thanks to this battalion, along with assistance from the Sith Lord Darth Vader; capturing Kenobi would greatly improve an Inquisitor's standing with Vader, in his eyes. During the hunt, the battalion went with the Fifth Brother to the planet of Daiyu, where they marched behind him through the streets of Daiyu City. However, the Fifth Brother and his stormtroopers were outdone by the cunning strategies of another Inquisitor, the Third Sister; she placed an open bounty on Kenobi, which led to his location being exposed to her when he was hit by blaster fire.
The 2023 Topps Disney Star Wars Obi-Wan Kenobi card set refers to this group as both a squad and a legion. Since Star Wars The Dark Side Pocket Expert doesn't offer any conflicting details, this article agrees with its description of the unit as a battalion.