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| | United States Encyclopedia Article @ HotAndCold.com (Hot and Cold) (Site not responding. Last check: 2007-10-25) |
 | | As new territories were being incorporated, the nation was divided over the issue of states' rights, the role of the federal government, and, by the 1820s, the expansion of slavery. |
 | | The Department of Defense administers the United States armed forces, which comprise the Army, the Air Force, the Navy, and the Marine Corps. |
 | | While the per capita income of the United States is among the highest in the world, the wealth is comparatively concentrated, with approximately 40% of the population earning less than an average resident of western Europe and the top 20% earning substantially more. |
| www.hotandcold.com /encyclopedia/United_States (6400 words) |
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