United States (Discovery and Facts) Preview – (click to reach directly on below options) 1. Amazing America (Basic Introduction) 2. History in Brief 3. Long Story of USA 4. Etymology (Naming America) 5. Geography Amazing America United States, also known as United States of America (USA). USA is the most developed country located in North America; it is a federal republic of 50 states. Besides the states in the main territory USA also includes the state of Alaska, and the island of Hawaii. The states of USA are bounded by Canada in north, by Pacific Ocean in west, and by the Gulf of Mexico and Mexico in south. The United States is the fourth largest country in the world in terms of area (after Russia, Canada, and China) and is slightly smaller than the entire continent of Europe. The national capital of USA is Washington. USA is spreaded over an area of 3.8 million square miles (9.8 million km 2 ), with a po