The Great Journey is the fifteenth and final campaign level of Halo 2. As Thel 'Vadam, you will fight alongside other Sangheili, and several Mgalekgolo, to reach Tartarus and stop him from activating the rings. You will work alongside a Scarab Tank being controlled by Sergeant Major Johnson to break into to the door of Delta Halo's Control Room where Tartarus is located. Then, you must bring down the Jiralhanae Chieftain, Tartarus.