Here is some of the civopedia from next war ...
Following the collapse of the much hated One World Government in the late 2030's and the ensuing political, military and economic chaos, four new power blocs have come to dominate the globe. America, Inc. controls all of the traditionally English-speaking areas of the world, as well as a large chunk of Old Mexico. Europa dominates the northern portion of the Eurasian continent, while the Pan-Asiatic People's Cooperative has gobbled up Asia, Indo-China, and Indonesia and what was the Philippines. The southern hemisphere (excepting old Australia and New Zealand) is controlled by the Southern Empire.
Population growth and rapidly-diminishing resources increasingly spark border tension between the Powers, and many feel that worldwide conflict is inevitable. And while during its brief existence the One World Government did manage to destroy much of the world's nuclear stockpiles, there's rumor that some of the Powers are rapidly rebuilding their arsenals while researching technologies that may allow the creation of even more deadly weaponry. When conflict comes, it's likely to be terrible indeed.
And the entry for America ...
Upon the collapse of the One World Government (OWG), the United States of America was among the quickest of the pre-OWG nations to reestablish its identity. Using both diplomatic and non-diplomatic (i.e. brute force) methods, the USA was able to expand it boundaries to include Canada. Allegedly seeking "cultural and lingual reintegration," the nation then launched an attack against Ireland and the UK. Despite surprisingly fierce opposition, the attack was ultimately successful, and Great Britain and Ireland became part of the US. Seeing nobody around that they liked better, Australia and New Zealand petitioned for inclusion in the new empire and were accepted.
The widespread empire was increasingly difficult to manage, and the government suffered from repeated charges of scandal, corruption, sluggishness and inefficiency. With many national functions at a near stand-still, the increasingly desperate empire's leaders decided to hand most of the government's functions to a mega-corporation which was then renamed "America, Inc." Now the entire empire is known by this name.
As run by the enigmatic "Mr. Big," America, Inc. is a moderately benign dictatorship. Taxes remain low, the mag-lev trains run on time, and the population is fairly satisfied with the way the empire is being managed. However, Mr. Big harbors global ambitions and as shown by his recent "liberation" of much of Mexico, seeks to expand the empire by any means necessary. Around the world uneasy leaders wonder just which place he'll "democratize" next. At the moment the Southern Empire's territory in South America remains the odds-on favorite.
And Mr Big ...
Chairman of America, Inc.
Background: Mr. Big, the enigmatic leader of America, Inc., first grew to prominence during the so-called "Struggle for Anglo-Saxon Cultural Reunification" - which is known elsewhere as the "North-American Conquest of Great Britain." As a general in the American armies, Mr. Big gained fame for his courage under fire (and his extraordinary expense accounts). A shrewd politician, Mr. Big was able to parley his popularity into the Chairmanship of America, Inc., which he retains today.
As leader of America, Inc., Mr. Big has pursued a vigorous policy of expansion, with Mexico City being the latest addition to the empire. He remains highly popular with his shareholders, despite an increasing level of irascibility, brought on (it is rumored) by continual problems with his bionic teeth.