Daiteikoku (大帝国)

Unified Story Prior to 0 years, human beings were scattered in only a few of the star regions of the vast universe, and each had built independent nations.
Normally traveling to other star areas by navigation requires more than a few hundred years, and contact with other countries was virtually impossible.
In the Unified Cosmic 0th year, research in “the mysterious space existing in the star area” advanced in the Eliis Empire, and we discovered that it can move instantaneously to other star areas using that space.
That space, named Warp Gate, brought together many isolated regions that had been isolated.
It is the beginning of the great voyage era.
Human beings able to build a country with multiple star regions as territory repeated invasion, conquest, obedience and extinction, rewriting the star network map – the world map every moment.
And Unified Cosmological Calendar 939 years.
The leaders of the three major powers seek war for each reason and are planning to open up.
In the parliament of the world’s largest nation – the Elysian Empire,
a world management plan was decided that Eislis should quell the confused world and rule it.
The oldest nation in the world · The Japanese empire is exhausted by the war with the prolonging empire and it is being aimed at by the great powers.
A large battle involving the world was going to light in space.