Battle of Ereesus

"And here I thought you were a cautious man, Captain. One day I'd like to be. For now, I want a word with that tac. In person."

- ap-Orwien and Rex

A battle took place on Ereesus between the Ereesus Planetary Security Forces and the Galactic Republic and the Separatists around 21 BBY. A squad led by Sergeant Palola was captured. CT-7567 led a team to recover them, acting on secret signals understood only by Lorrdians. The clone troopers freed the captives and took the tactical droid's head.

Behind the scenes
The battle of Ereesus appears in Speaking Silently, written by Jason Fry and released in January 2013's Star Wars Insider 139.