Unified Earth Government (UEG) 

Contrary to what most n00bs tell you, the UEG, not the UNSC is the main human government in the Halo games. Bungie doesn't talk about them much, but they appear to be a democracy lead by a board of leaders, one from each nation on earth. They are an evolution of the U.N, and for that reason, never seem to get anything done. The UNSC is the UEG's military branch, along with the Office of Naval Intelligence (ONI) as their intelligence agency and the Colonial Military Administration acting a defensive force for the colonies, much like the modern day U.S National Guard. The UEG uses a currency called Credits, and has an enormous budget, seeing as how there are about 30 Billion taxpayers (prior to first contact at Harvest in 2525). Most of that budget goes toward colonization efforts, while another large portion goes to the UNSC, because those fancy ships like the Pillar of Autumn ain't cheap.

"The UEG are liars. We're next!"-A random civilian on earth

"The Unified Earth Government will protect you. Yeah right"-another civilian

The Warthog is the workhorse of the Unified Earth Government (UEG) armed forces.

Unified Earth Government (UEG) by atomicpacman March 28, 2011