the UESC (United Equestrian Space Command) is at war with a conglomeration of aliens, titled "The Covenant", who are seeking the annihilation of all Equestrian life. You are a member of the Equestrian military, who are doing their best to hold the covenant back. It's about time you actually give them some help.
((You can either be a marine or an ODST. NO SPARTANS!!! While SPARTANS are a thing, letting you be one might be a bit OP))

1315368 A tall blackfurred diamond dog had his face hidden by his helmet. He was an ODST and was armed with his M6C and his SRS99-S5 AM. His team was about to be sent out into a fight to help get a few soldiers out of the killzone.

1461527 ((Quick thing, this takes place during Halo Wars (Because Halo Wars has all the awesome stuff))
Ashe sat in his pelican as it flew right in between two Covenant cruisers. The dropship was thrown with the force of a detonating shot from the UESC capital ship, The Cataclysm. The pelican continued flying, however.

1464001 His team loaded up into the pelican and flew out as fast as safely possible to help the trapped marines.

1465741 ((Quick nitpick, don't ODSTs come in from drop pods?))
The pelican soon made planetside, searching for a suitable place to land. After seeing the landscape marred with craters, Ashe wished he could have stayed on the ship. Bodies, both civilian and military, littered the ground. A single scorpion was attempting to fight through an entire company of wraiths. it was needless to say that the scorpion didn't stand a chance.