The Coveanant have just begun hostile operations agaisnt humanity and are so far succesful. The Prophets,Arbiter and the Brute chieftan lead this force.(This arbiter is from before the events of Halo 2).Now the UNSC has to fight hard with all they got Spartans Odsts and Marines sacrifice them selves for the hope of humanity.
Will you follow the will of the Prophets,Fight against them,or use gurreila warfare against both factions