Disclaimer: Do I really need to explain that I don't own or make money off this story and anything mentioned or used in it?

Authors Note: Technically this is a Naruto-Killzone crossover but I had to take quite a few liberties and borrow some elements from numerous other franchises in order to make it work. Besides, I also had some original characters lying around that I wanted to use in some way. Little bit of an experiment here so just enjoy.

The Johnson Brothers

Prologue

It all began with the Tunguska Event of 1908. Although the meteor never hit the ground, what was inside the meteor did…and what was inside of it was far deadlier than any meteor crash could have ever hoped to be. World War I happened as planned. Only this time, instead of Germany being blamed for everything, instead of the Treaty of Versailles or the infamous Fourteen Points, humanity was able to forgive one-another and what spawned from this was a peaceful, prosperous Europe. The Great Depression never happened, the Nazi's never came to power and World War II never happened. Russia however, continued to be an isolationist nation still under Tsarist rule, as Lenin's revolution was crushed.

However, everything changed in 1921when Russia initiated a communications blackout with the world and built a wall against the European border known as "The Red Curtain." Soon after, rumors began to leak out of Russia, depicting villages, towns, even entire cities disappearing overnight. European intelligence was eventually able to intercept the radio signals coming from inside but the only signal found was a single message repeated endlessly, saying "Brotherhood, Strength, and Fortitude...in the face of the angry night."

In December 1949, the Red curtain was suddenly breached by a massive onslaught of what appeared to be humanoid-like beings, dressed in black combat gear, each wearing a gas-mask and sporting glowing red eyes. By February of 1950, almost all of Europe was over-run, leaving few survivors. By this time, using what little technology they were able to get their hands on, as well as a few intercepted transmissions and stories of a few people who managed to escape, humanity had learned the first fragments of their new enemy.

They called themselves "The Helghast" and while their origins and goals remained a mystery, it was clear they wanted every last human dead. While there were numerous types of Helghast including various machines they deployed into battle, most Helghast seen up to that point were brain-dead humans being controlled by a parasite, which was bred in something called a "conversion center." The parasite was deployed in rocket shaped objects called "spires" through mobile artillery in various forms but mostly on giant walking robots dubbed "goliaths" by humanity. These spires carried thousands of parasite's that entered the human body through the mouth, causing the victim to fall into a coma. Entire cities could be infected within minutes through this method and was the Helghast's weapon of choice when wiping out major civilian populations. After the battle was over, the Helghast would then collect the bodies, where they were taken to a conversion center and turned into a horrific cross between human and Helghast and outfitted with the appropriate gear. There were no known forms of immunity or even resistance to this parasite. Further complicating matters is that by this time, the Helghast had taken over nearly the entire continent of Eurasia. Their a military and infrastructure was so large, victory seemed impossible for humanity.

However, just when it seemed like the Helghast were to cross the English Channel and invade Britain, they suddenly vanished. All attempts to relocate to the remains of the now-destroyed England failed, as the people who went never returned. Using this time wisely, the entire western hemisphere and Great Britain immediately began evacuating millions of civilians into the inner parts of the remaining continents and established the largest defense perimeters in human history preparing for the worst. With this, humanity waited for three and a half long years.

On May 15, 1953 the Helghast suddenly sprung up from the ground; not just in Britain, but in every remaining human-controlled territory. They had been digging at an immense pace under the earth ever since they first established their military. Having this advantage as well as the element of surprise, they were easily able to bypass the defense perimeters and find their way into the main civilian population centers while simultaneously launching an all-out assault on the lesser defended continents. Within 24 hours of this global assault, ¼ of the remaining human population was killed. Making matters worse were the new methods used to deploy their parasite; faster more agile artillery and various air transports. 72 hours after the assault, 1/2 of the remaining population had been infected.

Time was quickly running out; millions of civilians were being infected, the Helghast had started to establish strong footholds in the remaining human territories and it was clear that the even the military controlled zones wouldn't hold out for long once the Helghast were done with the civilians. Even retaliation was deemed suicide. Thus a global message was broadcasted, directing any remaining survivors to specially marked areas. These areas, later dubbed "zones" were locations where the Helghast could not penetrate the surface through the underground or that had been unscarred by the war. The people were given 12 hours. Once inside, the leaders of humanity did the unthinkable: Denying their enemy control, they unleashed a massive nuclear counter-attack on every section of the planet that was either under siege or already under Helghast control. In just two brief hours, what would become known as the "Firestorm Crisis" and the "First Helghan War" in humanity's recorded history was over. Extinction was averted but the effects were beyond devastating. While almost all of the Helghast on the surface and their occupied cities were eradicated, most of the people who couldn't make it into the safe zones were also killed in the counter strike. The surface had also suffered a terrible fate. Much of the surface was dangerously contaminated with radiation, and many areas of the surface were contaminated so badly, they could no longer sustain life. Only around 20% of the surface remained unscarred by the war or was still under human control.

Thankfully, a small part of the seemingly insurmountable tide turned in humanity's favor. While the Helghast had survived below the surface, almost all of their military had been on the surface when it was nuked. With almost all their military, conversion, production and manufacturing facilities wiped out, as well as the lack of humans to infect and convert, they were in no position to launch a second attack of any kind. As for the radiation, the government had thankfully foreseen this nuclear nightmare and began re-engineering their nuclear weapons so the radiation was much heavier wouldn't travel as far with the wind. This caused a need for a greater number of warheads, as the blast radius wouldn't be as strong but avoided total extinction.

Being safe for the moment, humanity spent the next few decades re-building itself. The Helghast had completely vanished again allowing humanity to focus on re-building the population, fortifying and uniting all the territories they still had under their control, further studying the Helghast parasite specimens and trying to reverse-engineer what little Helghast technology was left and mapping out all terrain affected by the war. The most dangerously contaminated areas were dubbed "Red Zones," the heavily contaminated but still minimally habitable areas were dubbed "Yellow Zones" and the unscarred areas were dubbed "Blue Zones." With their future secured and control regained, humanity's leaders met in New York City and after much talk and debate, the new earth government was formed on May 20, 1983 to mark the 30th anniversary of humanity's victory against the Helghast. It was named the United Earth Federation or UEF for short. New York City was officially re-named Federation City and designated the first official capital of planet earth. With that taken care of, the UEF waited for the Helghast to make their next move against them.

It's been 200 years since the formation of the UEF. Our story however, revolves around three brothers living a comfortable life in Federation City…a comfortable life that was soon about to change…