Write a well-developed, interesting, thought-provoking, tantalizing alternate future history + lore & backstory for the world of Naruto in the form of a book chapter, in which the following events happen in chronological order:


. The US Government initiates a Continuity of Government program when the global conflict and subsequent nuclear apocalypse that brings about the end of post-modern civilization starts, and so is able to ride out the world war, the atomic holocaust, and the post-apocalyptic hellhole that follows, safe in a series of underground bunkers and communities. American missile defense is able to defect most of the ICBMs headed for US Army bases, arms storage facilities, weapon production facilities and other key targets on the US mainland, so the US government has a secure base to rebuild the nation from.


Princess Kaguya still arrives to Earth, eats the Shinju fruit and rules the Earth as its defacto goddess after awakening her chakra and using its power to defeat the warlords ruling over the surface. Neither the US government or Kaguya have any idea of the other's existence, as the US government is still hunkered down underground and Kaguya is too busy with managing her responsibilities as a faux goddess to notice what's going on.


. In East Asia, Japan manages to survive the war and the proliferation of chakra thanks to Kaguya and her sons and grandsons relatively unscathed, thanks to its own, more advanced version of the US missile defense program.


However, the nation is taken over by the remains of the pre-WW2 Righteous Army and the surviving social democrats, who restore the pre-WW2 imperial system and conquer the Korean peninsula, Taiwan, North Sahlakin, the Carolines and Palau, reintegrating them into the Japanese Empire as prefectures.


A series of campaigns against the resurgent Chinese warlords sees the restoration of the old protectorates of the Empire of Manchukou in Manchuria and the Mongol United Autonomous Government in Inner Mongolia, as well as a revived Ming dynasty in China as a Japanese puppet state. East Turkestan and Tibet also become Japanese puppets.


The Japanese restore the Greater East Asian Co-Prosperity Sphere through the remains of ASEAN, and set out to rebuild East Asia while trying to keep their dominance.

In Europe, Western, Central and Eastern Europe survive the global conflict, the subsequent nuclear exchange and the rise and fall of Kagyua and her family after the atomic holocaust relatively unscathed, thanks to their own missile defense programs. But many of their own citizens are not exempt from this, and many Europeans die from radiation as the continent falls into a state of semi-anarchy.


Germany is the first to recover from this sad state of affairs. What remains of the militant monarchist movement infiltrates the fascist and national socialist groups and uses their influence to seize power in the country, proclaiming the restoration of the German Empire after securing their hold on the government. The alleged descendants of the House of Hohenzollern become the imperial family of this new German Empire, and they reclaim the Prussian territories and reinforce the treaty of Brest-Litovsk on Eastern Europe, restoring the German puppet states created there near the end of WW1.


After Germany, the Swedes are the next ones to recover, undergoing a spirit of national revitalization and conquering Norway and Denmark. The Swedes also defeat the warring factions in what used to be European Russia and reintegrate it into their country as a province, forming the United Scandinavian Czardom.


Austria restores the Austria-Hungarian Empire and through diplomacy, military might and skilled negotiation slowly regains its pre-WW1 territorial boundaries, making Serbia and Montenegro into satellite kingdoms along with Greece.


Spain restores the absolute monarchy created after Franco's death and conquers Portugal, afterward becoming united with Austria in dynastic marriage.