An organization dedicated to eradicating war named Celestial Being, begins demonstrating the power of their new "Gundam" mobile suits by interrupting the AEU public demonstration of its latest unit.

In A.G. 101, The war between the Earth Federation Forces and an Unknown Enemy would begin when the latter destroyed the space colony Angel, a tragedy that would later known as "The Day the Angel Fell.

Cosmic Era (C.E.) 73. About a year has passed since an armistice signed between the Zodiac Alliance of Freedom Treaty and the Earth Alliance brought an end to the First Alliance-PLANT War. However, ...