Duel on Dathomir

"To Dathomir to meditate on the Dark Side and train, Count Dooku now sends his Acolytes. Travel there and defeat one, you must, yes."

- Yoda

During the Clone Wars, Count Dooku began to send his Sith Acolyte to Dathomir, to meditate on the dark side of the Force. In order to stop this, Master Yoda sent a Jedi Knight there on a mission to defeat one of Dooku's Acolytes.