Looks like its United Colonies of Mankind (UCM) for me. After the "Abandonist" (Later calling themselves the Post Human Republic) ran off to hide like little girls; the Shaltari turned and looked the other way; the The Scourge came and threw the rest of humanity a serious beat-down. Well, I for one am not going to let this lie. Sign me up for some Reconquest Action.
In the words of General Douglas MacArthur on 20 March 1942 "I Shall Return"