The 13th Battalion, also known as the "Iron" Battalion, was a battalion of clone troopers led by Jedi General Jaro Tapal in the Grand Army of the Republic during the Clone Wars. They were outfitted with Phase II clone trooper armor—customized with light yellow markings—by the final days of the conflict, at which point the unit had secured the planet Bracca for the Galactic Republic. Their Venator-class Star Destroyer was set to depart for Mygeeto when the unit's Clone Commander received Order 66 from Supreme Chancellor Sheev Palpatine.
The protocol identified the members of the Jedi Order as enemy targets, causing the clones to betray their Jedi officers. Tapal's own unit turned against the general and fatally wounded him, but failed to kill his apprentice, Cal Kestis. Many clone troopers perished when the Jedi fought back during their escape, before which the ship reactor was sabotaged by Tapal in order to cover their tracks.
- Star Wars Jedi: Fallen Order (First appearance) (Appears in flashback(s))
- The Art of Star Wars Jedi: Fallen Order (First identified as 13th Battalion)