With the drying of natural resources and degradation of environment, the population growth reached its limit, and the world's economics and order were collapsing.
Day by day, the disputes from the regions all around the globe intensified, and outbroke into the 3rd World War.
In the end, all mankind's politics and economics were military unified by the birth of World Alliance Nation, and the Alliance Space Century was started.
Building of Space Colonies, reconstruction at Moon, construction at Mars, space exploration...
Space was the new frontier, and the sea of hope.
In a surprisingly short period of time, several urban areas at planets and space colonies were built.
The heat of construction that involved all mankind, now cooled down, and the dictatorship of a few let the World Alliance Nation's ideal to be lost.
The interests conflicted, and finally Earth was involved into war.
This war, named Revolution War, reaches its closure with the death of World Alliance Nation's sovereign Treize Kushrenada.
In regards to all the nations and races, a new republicanism New International Alliance was born.
However, Earth's mankind was now faced by threats from space.
The failure of Cygnus probe, Project Cygnulight; the landing of unknown giant artificial object EI-01; the invasion of mysterious enemy of mankind, Radam.
Also, with the invasion of those coming from Jupiter, the Jovian Lizards, mankind was forced to do a massive retreat from Mars sphere.
Mankind was about to walk a new path, but these new threats brought fear and insecurity, and tranquility was far away from reality.
Alliance Space Century 99.
A world that doesn't know its own future now heads to a new war.
The organization meant to unify all of mankind, the "World Alliance Nation", which was created at the end of the previous era, is now rotting along with time.
After the "Revolution War" that was started by the colonies' political movements, the "World Alliance Nation" was unmade, and the world is now back to the countries ruling their own territories like in the previous era, and a symbolic unification organization, the "New World Alliance", is born.
Alliance Space Era 98.
Earth and mankind must face obstacles coming from space.
Starting with the failure of Cygnus probe Project "Cygnulight" and the fall of an unknown giant artificial object "EI-01", mankind is attacked by an unknown enemy from outer space. Along with the invasions from unknown living beings called "Radam" and the "Jovian Lizards" coming from Jupiter, Earth is in a shocking state right after the end of "Revolution War".
At the same time, with the tecnology developed at Earth, a new obstacle appear, the occurance of terrorist actions using robots.
Alliance Space Era 99.
A world that doesn't know its own future heads to a new war.