When the Janus key has been completed and the UNSC saw a Forerunner outpost that is far away from the Sol system. They sent the Infinity and her fleet along with the Arbiter's Swords of Sanghelios fleet of the Shadow of Intent to investigate. Now what they find leaves them in shock. That there is a planet that is inhabited by Human and Faunas and if threats that lurk in the planet. What will happen to them.

There are those who sacrifice themselves in an effort to save humanity from the brink of extinction in the Human-Covenant War. Post Covenant War the UNSC has to contend with Covenant Splinter-groups and Forerunners. Follow the events of Y/N's Fireteam as one of their missions went wrong. Formally declared M.I.A. but were transported to the RWBY universe. Disclaimer: Halo owned by 343 Industries and RWBY and RedvsBlue by Rooster teeth.