Diclaimer: I do not own RWBY or Halo. Though i wish i did.
It has been said that Dust was the greatest discovery humanity would ever make. That it was the reason we were able to push back the grim and ensure humanity's survival. I disagree.
It was the trap that will ultimately ensure our downfall, for dust is the instrument of our destruction. We have relied on it for to long believing ourselves untouchable while under its influence.
2 years after the Great War, I and many of the same mind have gathered together to find a way out of the trap. It took us many years but we found alternate means to fuel our technology. We call it Fusion. Through many years of research we have discovered how to harness nuclear energy. We believed that our discovery would bring Remnant into a new age of prosperity. But the others were too set into their ways and unable to see the trap they had fallen prey to.
And so we gathered those who would listen and in a mass Exodus. we set out to the Dragon continent. There we build a new civilisation not bound by Dust. We build a great city which we named Reach.
Over time we began to expand and new villages were built and with this expansion came the renaming the Dragon continent, we called it Earth. As we continued to expand the villages wished for representation within the gouvernement. And so the Unified Earth Government or UEG was created and with it came the UNSC (United Nations Space Command) the military and scientific arm of the UEG.
With the discovery of Nuclear Fusion came new methods of war. New weapons using a substance called gunpowder, a mixture of chemicals that created an explosion that propelled a projectile much like how the others use dust. There were many new innovations in designs for warmachines that were kept from the others. Where Atlas advanced in their drone technology, we advanced in mechanics building armoured vehicles called tanks as well artillery. But our greatest divergence from the others was that we did not have hunters, nor did we utilise Aura, believing it to be a crutch and ultimately part of the trap we had spent so long avoiding. And so it was that the UNSC was our sole defence against the Grimm and other threats.
In the beginning things were difficult, the Grimm are and may always be a great threat to humanity. But it was not the greatest. No the greatest threat is ourselves as we squabble over meaningless things such as race and status. The UEG created laws to stop such things, and overtime inequality was removed from our society and all citizens now live in harmony, both Human and Faunus.
And as our brothers rejected us after our divergence from Dust so too did we reject them. We closed our borders and lived in isolation from the outside world as we advanced our technological knowledge and expanded our civilization to span the entire continent, reducing the threat of the Grimm to a mere annoyance, easily dealt with by our marines.
But all that changed with the incident 50 years after our Exodus. A village by the name of Harvest on the continent of Sanus within the influence of Vale was under attack by Grimm and too far away from any available Huntsmen to aid them. Admiral Preston Cole in command of battlegroup Poseidon, upon hearing the distress call, made for Harvest at full speed. It took the group of 12 Charon frigates little over an hour to cross the ocean and move to support the village.
The battle for Harvest lasted 4 hours before the Grimm were repulsed with battlegroup Poseidon hanging above the village like guardian angels. It was to this sight that huntsmen from Vale arrived to. And although the people of Harvest we grateful and haled Cole and his men as heroes. Unfortunately the rest of the world viewed it as an unsanctioned intervention on Vale soil, and Cole had invaded sovereign Vale territory. Admiral Cole simply stated that if aiding Harvest in its defence from the Grimm while Vale could not even spare a single huntsmen to defend it was an invasion, then he would happily invade Vale again.
As tensions were rising, the inevitability of war was increasing. But as all seemed lost, Professor Ozpin of Beacon Academy stepped forward and managed to disarm the situation before it could escalate further.
The UEG determined that after the incident, now being called the Poseidon Intervention, we would involve ourselves with the other kingdoms more. And so it is 30 years later that our story begins with a boy I made into a soldier, a Spartan. His name, Kyle-138.