The Unified Earth Government, between the dawn of interstellar travel in the 2360s and the start of the Great War in 2525, colonised nearly twelve hundred colonies located throughout the Orion Arm of the Milky Way galaxy. This number declined steeply after that date, as the genocidal Covenant union of alien species obliterated Human worlds one by one, despite the fiercest armed resistance the United Nations Space Command could muster and the ongoing establishment of colonies away from the Covenant axis of advance. By December 2552, the UEG was reduced to just one hundred and forty nine colony worlds, many of them new worlds established since 2525, and only 35 of them inner colonies. During the Remnant War period, the UEG sought to simultaneously reconstruct its shattered interstellar natio