The Unified Earth Government, abbreviated as UEG, is the primary civilian government that administrates Earth and it's colonies, serving as the reigning government of over 22 billion citizens spread across several hundred colonial world. It also houses the United Nations Space Command and the Colonial Administration Authority. The UEG has served as the primary government of all colonies within the confines of human space up until the Human-Covenant War, when drastic amounts of power were shifted towards the UEG's premier military and scientific branch, the United Nations Space Command.