When the Earth Federation established its first space colonies, an uneasy coexistence developed between the orbital settlements and their terrestrial rulers. Political resistance from Zeon, a colonial faction demanding autonomy, was met with economic strangulation by the Federation, who feared the colonies' independence would threaten planetary stability. A shift in Zeon's government transformed the movement into the Principality of Zeon, an authoritarian military regime willing to wage war to break free from Earth's control. What began as a political standoff escalated into the One Year War, a catastrophic conflict that would become humanity's most devastating armed struggle.