The republic is the result of the Treaty of Federalization, signed on September 8, 2029, by the majority of then-EU members. The federation was formally proclaimed a day later, on the 9th of September. After the conclusion the Contact War, it became the world's leading superpower, slightly surpassing the United States, and greatly exceeding even nations like China and Russia, which, pre-war, were considered to be superpowers (or at least soon-to-be superpowers).