Mission 25: Battle for the Moon

"Merg Vol was convinced he had been chosen by his gods to wield the power contained within the Forerunner structure. Having spent considerable resources to unlock its secrets, Vol managed to activate the structure's emergency defenses. With the deadly defenses at his command, MVol had become extremely dangerous. Unable to contact Spartan Davis since landing on Draetheus-V's moon, Palmer prepared to battle Vol on her own. Vol's exact location had not been difficult to find: the direct area at the foot of the Forerunner structure was littered with a trail of dead UNSC soldiers. Now there was one lone Spartan ready to finish the fight."

- Mission summary