Summoning the Union of South East Asia (USEA)

Time and Fate, if you were given the former and knew about the latter, what would you do?

Located in South East Asia, the nation known only as the Union of South East Asia (USEA) had long sat in one of the world's most important regions. Beset on all sides with nations wanting to take advantage of these important waterways, the union had remained mostly neutral for much its existence. To maintain its independent foreign policy, it had embarked on reforms to its industrial sector, allowing it to achieve unprecedented growth in the 2000s. Now the superstate proudly holds the title of "Emerging Power" as its industrial and military capabilities allow it to properly stand up against other great powers. But one day, a light engulfs them, transporting them to a world that has only existed in fantasy. Little did they know however, they were not the ones meant to be summoned.

Taking place 1 year after when Japan was supposed to be summoned to the new world, the world has seen considerable change. The Kingdom of Louria is on the verge of total victory against the Qua-Toyne Principality and the Kingdom of Quila, the Parpaldia Empire has underwent drastic reforms to its colonial administration at the behest of a certain member of the Imperial Family causing a rift to open between the Imperial Family and the military, the demons from the Grameus Continent have broken through the doors of the world and are marching south to conquer all of the Fillades Continent only to be barely stopped by a coalition of nations, and finally, the Gra Valkas Empire wages a war of conquest against the HME led World Union. How will USEA fair in this hostile world? What happened to Japan's supposed summoning that never materialized?
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This is a fanfic based on Minoru's "Nihonkoku Shoukan/Summoning Japan/Japan Summons". Aside from Minoru's work, I was also inspired by several other fanfics of the same work. Pictures and media used belong to their respective owners