Atlantic Federation

The Atlantic Federation is the largest and most powerful member of the Earth Alliance in the Cosmic Era timeline. Although allied against ZAFT, the Atlantic and Eurasian Federations have long been rivals, and a strong undercurrent of mistrust remains between them. The Atlantic Federation is a superstate successor of the United States of America and the Organization of American States (plus Great Britain and Ireland), its capital is Washington DC and its President still lives and works at the White House.

The Atlantic Federation provides the largest segment of the Earth Alliance's military, and pioneered the efforts to develop advanced mobile suits to counter those of ZAFT. The Atlantic Federation also has broader and deeper anti-Coordinator sentiment than the rest of the Alliance, and has been more thoroughly infiltrated by Blue Cosmos. While the Atlantic Federation solidified its position as the dominant force in the Earth Alliance with its large mobile suits force which tried to hold the Alliance together, the heavy losses it suffered in the final months of the war could provide the Eurasian Federation the opportunity it has been waiting for to supersede them as the leaders of the Alliance.

The Atlantic Federation attacked and annexed the United States of South America in the pretense of fighting ZAFT during CE 70. After the cease-fire at Jachin Due, however, the United States of South America rebelled against the Atlantic Federation. The most prominent member of this rebellion was former Earth Alliance ace Edward Harrelson, also known as "Ed the Ripper".