Code Geass Alexander of the Vengeance World:
The world as intended for a friend's fan-fiction (unlikely it will ever be written but I thought all of this up for him anyway). Spoilers for the series await those who read this. You have been warned.
It is the year 2040 ATB now 22 years since the death of the Demon Emperor Lelouch Vi Britannia and the beginning of the Zero Requiem and the world peace it brought. The world is now on the brink of war.
Whilst the post-Zero Requiem world did experience peace due to the mutual suffering of the entire planet under the tyrannical rule of Lelouch Vi Britannia and the hopes placed upon the United Federation of nations for creating a global union under the light of democracy the political realities of a world recovering from a series of horrific global wars quickly set in and the world began to take a turn for the worse.
Whilst founded on the principles of Liberty, Equality, Fraternity and Democracy the United Federation of Nations soon began to experience problems amongst its many constituents. The UFN was mainly composed of nations that made up the former Chinese Federation and European Universe and the consequences of such a composition began to quickly come back to bite the fledgling UFN. The UFN had had no initial universal economic policy due to it being formed in wartime as an alliance to defeat the Britannians and began to suffer conflict between the liberal capitalist policies of the EU and the imperial socialist ideals of the Chinese Federation. This served to cripple the economy of the UFN. Further problems were caused by the ensuing energy crisis caused by the detonation of the majority of Japan's Sakuradite deposits by Emperor Lelouch during the Battle of Mt Fuji. This not only crippled Japan economically (the equivalent of OTL Saudi Arabia burning the oil fields) but led to major repercussions across the whole planet as tensions rose over the management of the remaining deposits especially those remaining in Britannian territory. This led to increasingly radical groups establishing themselves within the UFN and even the Black Knights.
As tensions rose and relations broke down events came to a head in 2035 with the usurping of the UFN Parliament by the Black Knights during a Union wide period of civil unrest. A shadowy figure who named himself Commander Nakagiwa had deposed Zero and the old High Command and replaced them with new figures who largely supported his faction and reorganized the UFN into a far more efficient (and authoritarian) superpower. The new regime is based on tradition, cultural integration, technological advancement, hard work and discrimination against Britannians, often as a scapegoat as Britannia did not suffer as badly in the post-Zero Requiem situation due to not having suffered invasion and civil war as the other powers had (with the exception of the suffering under the reign of Emperor Lelouch).
The United Federation of Nations is now a true superpower on the world stage. Controlling the entirety of Eurasia and Africa the UFN is a radically different nation from its inception. The UFN is now organised into member state categories depending on social stability and economic development. The capital of the UFN is Tokyo as the headquarters of the Black Knights and the seat of the UFN Parliament. Japan has managed to recover its economy based on high-technology and business transactions. Japan underwent a major cultural revival reaction after the pull-out of the Britannians and has even begun to export it to the other member states of the UFN but not on the same scale of OTL due to the large scale destruction of Japanese culture during the colonial occupation the new culture is almost comically exaggerated by some (there are issues with those who do remember what it is like and do not approve of selling their heritage).
The nations of Europe outside the Balkans along with those of Eastern Asia are fully integrated member states in the UFN however the Middle East and much of Africa are still governmentally administrated states that are run with colonial cruelty in order to develop them. Despite the authoritarian nature of the Black Knight military government it is a truly multi-racial and multi-cultural nation that does utilise talented people from every ethnic that is ruled by the UFN. There have been several attempts by the UFN to create a multi-cultural melange for the UFN in order to promote unity but it has not caught on in most of the states especially due to its relatively recent creation. The UFN government is undergoing internal investment as money from taxation and trade is put into building and rebuilding infrastructure across the UFN especially in the administrated states.
Much of the Middle East and Sub-Saharan Africa are home to anti-government organizations and are still undergoing continued military occupation by the Black Knights. The Empress of the Chinese Federation and President of the EU are still the leaders of their respective superstates within the UFN but are now strictly subordinate to the UFN governing bodies who are in turn subordinate to the CEO of the Black Knights.
The UFN is undergoing increased mobilisation and militarisation as the Black Knights prepare for the final war of Britannian Annihilation. Government propaganda machines work hard in order to gather greater and greater public support for the war effort and more and more government contracts and grants are being placed with corporate research departments as well as the governmental departments in order to develop new weaponry to give the Black Knights an advantage over the rearmed Britannian Empire. Society in the UFN is one of fear as the security state and secret police forces keep a constant eye on the citizens for any sign of dissent. Education and media in the UFN is heavily monitored by the black Knights and censorship is common. The proliferation of pirate media is a constant annoyance for the Black Knights.
Opposing the UFN is the Holy Britannian Empire. Britannia has come far since Zero Requiem and has since abandoned the racist and expansionist policies of the previous regimes. The colonies in the Americas and the eastern Pacific were too heavily integrated, colonised and important to national prestige to abandon and thus the Western Hemisphere is still ruled by the Empire.
Nunnally Vi Britannia is still the ruler of the Empire and still holds considerable power within the government but their have been serious restrictions on the power of the Imperial family since the death of Emperor Lelouch. The Imperial Senate is still dominated by the aristocracy and corporate lords but the hyper conservative elements of Britannian society were wiped out by either Lelouch's purge or the destruction of Pendragon. Pendragon is still undergoing reconstruction from the Fleija (there is nor radiation but there is a giant semi-spherical hole where the city used to be) and the capital has been moved to the Philadelphia.
Due to the death of much of the old aristocracy and the implementation of the new racial laws many new noble families have been granted titles for the empty estates including most controversially, several non-Britannians. The granting of citizenship to all Imperial subjects has seen a lot of progress within society and even a reduction in most terrorist organisations (hard-liners still provide new recruits for the Britannian army with useful experience in practical jungle and mountain warfare experience) There have been several changes as non-Britannian talent has been brought into the government and military High Command including a Portuguese Brazilian man in the Knights of the Rounds (he still keeps his head down). The old colonial Areas have also been reorganised into integrated provinces for more effective administration (its much the same as before but with somewhat less bigotry and genuine attempts to remove corruption. Results vary) which is not as difficult as it is for the UFN due to the previous force-draft style economic development Britannia subjected the Areas to actually succeeded in developing much of the Areas.
Britannia did not suffer as severe an economic dip as the UFN after Zero Requiem due to the lack of general destruction from war and invasion and was able to quickly convert their economy back from a military based one whilst also averting the energy crisis due to their switching to nuclear power and then later sharing it with the UFN when safe nuclear power plants had been developed (however the technology and information for constructing Fleijas is strictly, universally illegal and was reportedly destroyed along with the Damocles). This has led to less of a social backlash but did see the government continue to revert from democracy back to traditional absolutism as well as the rise of the Nakagiwa regime which discredited democracy in Britannia further and led to emergency measures being taken.
Britannia however is facing a major issue. Empress Nunnally's physical state has been deteriorating for years now and has been growing worse along with the political situation. It has been accredited to extreme mental stress which along with her lack of children (and most of the Imperial Family having died in the destruction of Pendragon) has begun to have affects on the Britannian government and society. Nunnally has named one of her more obscure remaining relatives her heir-apparent, the Beaumont family who married into the Imperial Family several generations ago and found themselves at the top of the list after Nunnally took the throne.
Britannia has undergone extreme rearmament after the rise of the strictly anti-Britannian Nakagiwa regime in the UFN and has restored the Britannian military to their former scale. There has been a major effort by Britannian media/propaganda to reaffirm the Britannian people with their martial traditions and prepare them for the coming war with the UFN. Due to the periods of peace and Empress Nunnally's conviction that accords can be reached with the UFN Britannia has struggled to regain its technological edge but developments are being made and new weapons are being produced to augment the armies of Vincent and Gareth knightmare frames that are now the new standard for the Britannian military.
The Republic of Australia is still neutral and disassociated with either faction. However it has been forced to grant mining concessions to the UFN after a bit of 'gunboat diplomacy' which has led to increasing pro-Britannian sentiment within the Australian Parliament. However the presence of Black Knights forces in the South Pacific is keeping them from showing any definite support to the Britannian Empire.
Zero is currently under house-arrest for pro-Britannian sentiment by the Nakagiwa regime. There is also rumours that Zero is not only supportive of Britannia but has been intimate with Empress Nunnally. These rumours have also been extended to most of the founding members of the Black Knights who have been revealed to be surprisingly opposed to the changes made by Nakagiwa and the Black Knights despite having fought the worst of Britannia under both Charles and Lelouch and were expected by many in the UFN to only expect the worst from Britannia. Many of the other heroes of the Black Rebellion have also been removed from office and put under observation by the new Black Knight administration.
Meanwhile a young Britannian noble is almost of age to inherit his families estates and holdings from his guardians. With his parents death his guardians have not treated him well and he seeks vengeance for the grievances he has suffered. He believes that his families military contracts from the days of Charles and Lelouch will give him the means to complete his quest for vengeance and begins to plan.