By 1999 AD, the governments of Terra realize that a unified government is needed to manage global crises. This new government is called the Equestrian Federation, as the winning idea for a global government was proposed by the trading superpower known as Equestria.
Six years later, the Equestrian Federation starts its space colonization program. The next forty years are spent constructing the first space colonies.
By nineteenth year of the Universal Century, the Equestrian Federation has begun moving portions of its massive population into space. These colonists, termed Spacenoids by the Terra-side citizens, are forced to adapt to their new lives and occupations.
Universal Century 0069: Political tensions between the Equestrian Federation and the newly established New Lunar Republic, Mars' space and ground colonies unified by former Equestrian Princess Luna, are extremely high. Federation politicians know that any kind of incident could spark a civil war.
Universal Century 0079: The New Lunar Republic begins its offensive against the Equestrian Federation. The Solar Civil War has begun.
Only one faction can survive this conflict. The one that does will own the solar system.

Rated Teen for mild blood and language.
Crossover with Mobile Suit Gundam (the Universal Century timeline)