Descriptions:

The USA is the world’s foremost economic and military power, with global interests and an unmatched global reach.

America’s gross domestic product accounts for close to a quarter of the world total, and its military budget is reckoned to be almost as much as the rest of the world’s defence spending put together.

The country is also a major source of entertainment: American TV, Hollywood films, jazz, blues, rock and rap music are primary ingredients in global popular culture.

The United States originated in a revolution which separated it from the British Crown. The constitution, drafted in 1787, established a federal system with a division of powers which has remained unchanged in form since its inception.

• United States of America
• Capital: Washington, DC
• Population 316 million
• Area 9.8 million sq km (3.8 million sq miles)
• Major language English
• Major religion Christianity
• Life expectancy 76 years (men), 81 years (women)
• Currency US dollar