The United States of America was one of the former nation-states. Along with the Union of Soviet Socialist Republics, it was one of the two superpowers, but these declined in the late 20th century. A new economic power struggle began to rise in the wake of the failure of the US protectionism amendments.
In 2025 the USA lost California, and its eastern coast was flooded, as a result of the global waring. The USA collapsed, along with Canada, and Mexico was nothing but divided federations. The remaining US states formed the North American Alliance by incorporating the last Canadian states in 2037, and Mexico in 2064.