Mobile Suit Gundam: The Interloper Saga

Background
The year is 300 IA

At the beginning of the age, humanity acquired the knowledge and technology necessary to travel between stars at faster-than-light speeds, utilizing wormholes to travel light years in only weeks or months. Humanity took advantage of their new-found freedom, quickly took to the new frontiers of space, settling in the nearest habitable star systems and terraforming entire worlds to support them.

Eventually, there was a civil war fought between the Unified Sol Federation and various rebelling extrasolar colonies over independence. Lasting seven years, this war accomplished nothing but the division of humanity and only ended when, at the most inconvenient of times, humanity had its first encounter with alien life.

Attacking without warning or reason, these powerful and mysterious beings known only as the Interlopers preyed upon the extrasolar colonies, obliterating any opposition and advancing through human territories without prejudice. When all seemed lost and the Interlopers were at the edges of the Sol System, their campaign of extermination was miraculously halted by the combined efforts of humanity's greatest military minds and soldiers, but at a great cost. The USF military and all known extrasolar colonies had been crushed almost irreparably.

Many years later, the USF began to rebuild and reclaim the worlds it lost in the genocidal alien invasion, however, evidence and fears that the invasion was only the first wave, humanity prepared themselves. Seeking to never again allow themselves to be the victims, the USF began creation of a new class of military hardware to combat against this alien threat: the Gundams.