General Information
The United States of America is a federal republic composed of 50 states, of which all except one-Hawaii islands - are in mainland America. The United States of America, which covers the central part of North America, grew out of the British colonies that were established in North America in the first half of the 17th century.
USA's participation in the First World War and the victory of the Allies made it a world power. The end of the Second World War saw the emergence of USA as one of the super-powers of the world.



