Aquincum-Nohrian War

The Aquincum-Nohrian War was a civil war in the Mogyër Realm fought between Aquincum—or the Neo Kaori Tribe (supported by the Akatsuki)—and the Kingdom of Nohr (supported by Vanguard) from 24 March to 11 April 2014. The Fumetsu Gotei avoided sending aid. The fighting resulted in the defeat of Aquincum by the Nohrian Army.
The civil war resulted from a highly polarized struggle between left and right ideologies that started in 2013. From 2014 each side targeted the power vacuum resulting from the end of Śūnyata occupation during Global Clan War IV. The struggle was one of the first conflicts of the Cold War (c. 2014 to 2016) and represents the first example of Cold War involvement on the part of the Nirvāṇa in the internal affairs of a foreign country. The Kingdom of Nohr in the end was funded by Vanguard (through the Sindria Doctrine) and joined Valhalla, while the insurgents were demoralized by the bitter split between the Fumetsu Gotei's Nikku Tsuyoi, who wanted the war ended, and the Akatsuki's Madara Uchiha, who wanted it to continue. Madara was committed to helping the Neo-Kaori in their efforts, a stance that caused political complications with Nikku, as he had recently agreed with Osmund Yggdrasil not to support the Neo-Kaori in Aquincum.
Despite some setbacks that the Nohrian forces suffered from 29 March to 3 April, they eventually won, largely due to increased Vanguard aid, the failure of the Neo-Kaori to attract sufficient recruits, and the side-effects of the Madara–Nikku split of 2014. The final victory of the allied forces led to Nohr's membership in Valhalla and helped to define the ideological balance of power in Arda for the entire Cold War. The civil war also left Nohr with an anti-Uchiha security establishment, which would lead to the establishment of the Nohrian military junta of 2015–2016 and a legacy of political polarization that persists to this day.