Halo Wars
UNSC Spirit of Fire’s efforts against the Covenant in 2531.
Near the northern pole of the battered planet of Harvest, a Covenant military force excavates something buried in the ice a hundred thousand years earlier. When the UNSC Spirit of Fire discovers that the Covenant has uncovered a map left by an ancient alien civilization, the humans pursue the Covenant, eventually arriving at a remote system which holds a shield world.
Buried within this artificial planet is a fleet of starships with the power and technology to end the war and destroy all of humankind. It is there that the Spirit’s crew is forced to stand and fight the Covenant, hoping to eliminate the dark threat of this new technology and bring an end to this Covenant's unrelenting efforts.