Once Empress Nunnally was coronated as Britannia latest Empress, she immediately began peace negotiations with Area 11, beginning by returning Area 11 to it's original form, of Japan, allowing them independence of Britannia, and offering to assist in rebuilding Japan, in exchange for an alliance with Britannia. Suzaku, in disguise as Zero, Leader of the Black Knights, even brought forth, the suggestion of Britannia stationing a small detachment of Britannian troops in japan, while The Black Knights also stationed a small detachment in Britannia's capital, to show each others new found friendship. On the surface, things were flowing smoothly. However, often times, such deep scars as war, are not so easily forgotten.
Many Britannians still believe themselves above the Japanese, or as they still lie to call them behind closed doors, 11's, despite Empress Nunnally emphasizing how Britannians are no greater than any other. To drive that fact home, Empress Nunnally has been very strict on her laws against discrimination, and racism, even going as far as stripping nobles of their nobility, as punishment for acts of racism. As such, few nobles now voice their opinions on the Japanese. However, this doesn't stop the Britannian troops from often times antagonizing The Black Knight detachment stationed at the capital. This information has often made it's way back to Japan, and angers the Black Knights that their Comrades over in Britannia get treated so, despite the Empresses efforts to prevent such incidents. This has often led to the Japanese in Japan to act in a similar fashion to the Britannian detachment in japan, which in turn makes its way to Britannian forces in Britannia, thus angering them, creating a viscous cycle. But those were only the beginnings.
Many in Britannia feel that the Black Knight troops stationed in the capital, are one of Zero's elaborate plots, to attempt a coup d'eta against Britannia. At the same time, the Japanese believe that the Britannian Empress is positioning her enemies to attack Japan, just as it lowers its guard. More conspiracy theories began cropping up, but all were unfounded, often being formed from nothing more than one factions dislike of the other.
For years, this went on, tensions kept at a relatively low level, by each factions respective leaders. But then, the Black Knights faced an unforeseen event. Zero, once again, vanished without a trace, leaving Kallen as leader of the Black Knights. This shook the Black Knights, some even voicing their beliefs that Zero had actually been assassinated, and was being covered up, with the story that he left of his own free will, leaving Kallen as the leader. A few even challenged Kallen for leadership. However, after a few months of chaos among the ranks of the Black Knights, order was returned, Kallen still holding her position of Leader of the Black Knights. However, conspiracy theories still remained, making Japans and Britannias peace even more stressed.
And from the chaos among the Black Knights, several higher ups in Britannia began worrying about an attack, from some of the more anti-Britannian members of the Black Knights. Which caused some of the more anti-Japanese members of Britannia to increase their attempts to ostracize the Black Knights stationed in the capital of Britannia.
And so, years passed, after Zero's disappearance, and tensions continued to rise imperceptibly , as each faction restrained their thoughts of the other, as the Leaders attempted to keep mending broken bonds. Japan has become greatly fixed, over the 22 years, many of the regions that had been lowered to rubble, now looking as they once did before Britannias initial invasion. However, Japan has decided to leave the area surrounding the site of the first F.L.E.I.J.A. Warhead, as a monument to those that lost their lives, whether willing or not, during the time of Japans war for freedom, and the trials it faced.
Knightmare Frame development has all but ceased, with no new research being conducted, nor any new weapons under going testing. At most, the only form of new Knightmare Frame that has been done, has been from those wealthy enough, ordering a custom made, or modified Knightmare Frame, though, often times, it's meant more for decoration, than for actual use.
As it stands, the most threatening force for either faction, is those that break from the ranks to lash out at the other side. However, these are dealt with swiftly and efficiently. It seemed the world had reached the greatest level of peace that could be achieved at this point, with no threat of open conflict from either faction.
However, a force forgotten to all, but those who played an active role in his story, has returned. He appears all over the world, at the exact same time, his mask and commanding voice bringing back good and horrible memories. His name: Zero. Arriving in a spectacular fashion, much as the last Zero, with dramatic flare, with a proclamation, that will shake the world.
Now, new heroes, both in combat, and on the field of diplomacy, must arise to face this new great and powerful threat. However, can the Black Knights and Britannia put aside their pasts, their love, and hate, as well as their memories of each other, and this all too well known foe, for the good, of the entire world?