n the middle of 20 th century of Western Time .Against the background of a wide-range of immigration among human being and of the disappearing of boundaries between races, one of the most influential revolutions breaks out as Global Independence United Government�, sponsored by a number of developed countries and based upon United Nation , comes to being .As time goes on ,more and more nations join the organization. And the first united government on the earth comes to exist in human being history.
Human being have their own residences on the moon, on the Mars and on the astrospace . Living environments around these residences proved to be dissatisfactions .And authorities on the earth are discriminative of residents on the astrospace. The deteriorating conflicts ,based upon unfair wealth distribution, backward welfare system, resource distribution ,combine to give rise to revolt among residents on the Mars .They form their own government and make full use of robot-operating skills developped during operation time in the astrospace to defeat the army, equipped with backward weapons ,which is sent by Global Government.