Build a short alternate history timeline for a crossover fanfic between High School DxD, Stargate, Muv-Luv, Tom Clancey's Endwar, Tom Clancey's Ghost Recon, Call of Duty: Modern Warfare 1, 2, 3 & 4, Call of Duty: Black Ops 3, Call of Duty: Advanced Warfare, Call of Duty: Infinite Warfare and Halo in which the post-618 AD, pre-907 AD Mongol-Manchurian Imperial House of Li-ruled absolute imperial dynastic monarchy of the Great Tang Empire/"Tang dynasty" ruling over Han China from [the Great Tang Empire's stronghold and base] East Turkestan and the Hui-dominated Central China, [the Tang dynasty in this fanfic] migrates [the Tang dynasty in this fic] to the land of Yamato [Great Yamato |Yamato|, ancient, pre-shogunate Japan, |Yamato|, which |Yamato| consisted of the Japanese Home Islands, the entire Korean peninsula and Russia's Sakhalin and Kurils Islands along with some parts of Cantonia |Guangdong and Guangxi|], [the Great Tang Empire's/"Tang dynasty after migrating to Yamato in this timeline] quickly conquering it [Yamato in this timeline] and the descendants of the Imperial House of Li intermarrying into what would become the real-life Japanese imperial family, the supposedly Shinto Gods-descended Japanese Imperial House of Yamato and the nobility, aristocracy and royalty of the Tang dynasty intermarrying into the indigenous Japanese nobility, aristocracy and royalty, as Tang-conquered Yamato in this timeline became a stronghold from which the Tang hoped to reconquer China, although this quickly faded away as the Tang dynasty was quickly absorbed into what would become Nihon/Nippon [the Land of the Rising Sun/Japan |Nihon/Nippon|] and became a separate state from mainland China once again, although the nobility, aristocracy and royalty of this new Tang-Yamato almagam state continued speaking in Manchu, Mongolian and Chinese and writing in said languages [Manchu, Mongolian and Chinese], viewing these languages [Manchu, Mongolian and Chinese] as the peak of civilization although they also spoke and wrote in Japanese. 

This version of Japan views itself as the "true China" and the state with the eternal Mandate of Heaven in contrast to the ever-lasting cycles of dynasties and empires in the China region. 

The influx of advanced technologies, military might and cultural and religious development from the Tang and Japan's indigenous culture and religion lead to a potent mix that made it the strongest naval power in the region. 

This version of Japan still has the first shogunate formed in it on Aug 21, 1192 however. 

Japan also never lost the Korean peninsula to the ethnic Korean general Yi-Seong-Gye, who [Seong-Gye] formed the Joeson Kingdom in real life due to Seong-Gye being killed on the transition from the Mongol Empire splinter state of the Yuan dynasty to the .

 The pre-Qing, post-1368, pre-1662 Han Chinese Imperial House of Zhu-ruled absolute imperial dynastic royal monarchy of the Great Ming State/Great Ming Empire/"Ming dynasty" still exists but with Japan maintaining control over Korea, the Ming and this version of Japan engage in a cold war until the Jurchen tribes of Manchuria conquer the Ming and establish the Great Qing Empire in 1662. 

The Ming and later the Qing dominate the land of the China region with this form of Japan dominating the seas. 


The Cantonese and the Han still resist the Manchus and the Qing and launch rebellions against both and Japan still has the Meiji restoration in 1868, but the shogunate system is not removed in Japan, instead the Japanese imperial family regains its power while the shoguns run Japanese local government. 

The Xinhai Revolution of 1912 still topples the Qing and puts the Beiyang Government-ruled first Republic of China as the government of China, however the Beiyang Government remains true to its goal of being a regency for the restoration of the Ming and the Ming is restored as the government of China.

Thus the Beiyang Government is the Empire of China formed by Yuan Shikai in 1915 in real life, however it [the Beiyang Government] never is formed as a republic and is instead an Empire ruled by the Imperial House of Zhu. 

Thus the Xinhai Revolution's goal of "Overthrowing Qing, restoring Ming" is fulfilled 

 Japan takes Manchuria as a protectorate along with Greater Mongolia during the Xinhai Revolution. 

Japan later makes Manchukuo into the Japanese protectorate of Manchukuo and [Japan] splits Inner Mongolia's Chahar and Suiyan regions from Greater Mongolia to form the Mongolian Autonomous Federation. 

The Ming being restored after the Xinhai Revolution prevents the modern warlord era and thus the Second Sino-Japanese War, and so both the Beiyang Government and Imperial Japan last until the later half of the 20th century and beyond. 

Woodrow Wilson and Vladimir Lenin both die during the Russian Civil War and so the RSFR never expands beyond European Russia and the USA becomes isolationist after WW1, which ends in a Central Powers victory due to Japan joining the Central Powers after a mistake leads to British and Japanese troops firing on each other. 

This version of Japan replaces the absolute parliamentary constitutional royal imperial monarchy of the German Royal House of Saxe-Coburg and Gotha-ruled Holy Brittanian Empire [Code Geass franchise] ruling [the Holy Brittanian Empire] over the Southern United States, all of the Lesser Antilies, French Guyana, Suriname, Egypt, Sudan, Somalialand Kenya, Uganda, South Africa, Gambia, Sierra Leone, northwestern Somalia, Zimbabwe, Zambia, Botswana, Nigeria, Ghana, and Malawi, Malyasia, Brunei, Singapore, Greater India [Pakistan, Bangladesh and India], Oman, Yemen, and Oceania [Australia and New Zealand] from [the Holy Brittanian Empire's homebase] Canada and Greater Jamaica [Jamaica, the Turks and Caicos, Belize and the Cayman Islands] but Brittania still exists in this timeline.