United States of North America (in short: Union States, the State, USNA, or the Federation) is a federal constitutional democracy comprising 29 planetary commonwealth, span across 14 solar systems. By late 21st - early 22nd century, the most distant colony world within the Union States Sphere is 72.27 light years from the Solar System(1)
The nation encompass the whole North and Central Americas, and later, the Caribbean region; rising after the reformation of Greater America Republic, transforming from a militaristic-corporatist superstates, into a federal democratic one within a decade.
With more settlements outside the Solar System than any other country, save for the Confederation of Asia Pacific, Union States is the largest country by total area, and third largest by population. This is also one of humanity's most ethnically diverse and multicultural nations, result from waves of large-scale immigrations after the reform of law in late 20th century, decades of aggressively & eagly territorial expansion.
Today, only the Confederation of Asia is better than the Union States in term of economy, better society & lifestyle.