The following outline is provided as an overview of and topical guide to the United States: United States of America – federal republic located primarily in North America, and the world's third-largest country by both land and total area.
It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations.
With the Soviet Union's collapse and the subsequent end of the Cold War in 1991, the United States emerged as the world's sole superpower.
The geography of the United States varies across their immense area.
Order of succession applies only to within the cabinet; the vice president has always been first in the line of succession, and the Speaker of the House and the President pro tem of the Senate have at times been included.