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The Thirteen original states are [[Connecticut]], [[Delaware]], [[Georgia]], [[Maryland]], [[Massachusetts]] (including [[maine]]), [[New Hampshire]], [[New Jersey]], [[New York]], [[North Carolina]], [[Pennsylvania]], [[Rhode Island]], [[South Carolina]] and [[Virginia]].  In 1790, an agreement between supporters of Jefferson and those of [[Alexander Hamilton]] resulted in the creation of the [[District of Columbia]] from part of [[Maryland]]; it has served as the national capital since 1800.  The remainder of the 1783 territory was eventually organized as the states of [[Ohio]], [[Indiana]], [[Michigan]], [[Illinois]], [[Wisconsin]], [[Kentucky]], [[Tennessee]], [[Mississippi]] and [[Alabama]].   

The Thirteen original states are [[Connecticut]], [[Delaware]], [[Georgia]], [[Maryland]], [[Massachusetts]] (including [[maine]]), [[New Hampshire]], [[New Jersey]], [[New York]], [[North Carolina]], [[Pennsylvania]], [[Rhode Island]], [[South Carolina]] and [[Virginia]].  In 1790, an agreement between supporters of Jefferson and those of [[Alexander Hamilton]] resulted in the creation of the [[District of Columbia]] from part of [[Maryland]]; it has served as the national capital since 1800.  The remainder of the 1783 territory was eventually organized as the states of [[Ohio]], [[Indiana]], [[Michigan]], [[Illinois]], [[Wisconsin]], [[Kentucky]], [[Tennessee]], [[Mississippi]] and [[Alabama]].   

=== Louisiana Territory ===

=== Expansion===

In 1803, [[French]] emperor [[Napoleon Bonaparte]] took advantage of a lull in his war with Great Britain to sell the [[Louisiana Territory]] to the United States, more than doubling the nation's land area.  This territory would later be organized as the states of [[Minnesota]], [[North Dakota]], [[South Dakota]], [[Montana]], [[Wyoming]], [[Nebraska]], [[Iowa]], [[Missouri]], [[Arkansas]], [[Kansas]], [[Oklahoma]], and [[Louisiana]] proper.  President Jefferson commissioned [[Lewis and Clark]] to explore the new territory, which they did from 1802 to 1804.

In 1803, [[French]] emperor [[Napoleon Bonaparte]] took advantage of a lull in his war with Great Britain to sell the [[Louisiana Territory]] to the United States, more than doubling the nation's land area.  This territory would later be organized as the states of [[Minnesota]], [[North Dakota]], [[South Dakota]], [[Montana]], [[Wyoming]], [[Nebraska]], [[Iowa]], [[Missouri]], [[Arkansas]], [[Kansas]], [[Oklahoma]], and [[Louisiana]] proper.  President Jefferson commissioned [[Lewis and Clark]] to explore the new territory from 1802 to 1804.

The U.S. purchased [[Florida]] from Spain in 1819. [[Texas]] joined the United States in 1845 after winning its revolution against Mexico.  

The U.S. seized, then purchased [[Florida]] from Spain in 1819. [[Texas]] joined the United States in 1845 after winning its revolution against Mexico.  

After victory the [[Mexican American War]] of 1846-48, the U.S. purchased via the [[Treaty of Guadalupe Hidalgo]] territory that became the states of [[California]], [[Nevada]], [[Utah]], [[Colorado]], [[New Mexico]] and [[Arizona]].  In 1846 the U.S. and Britain agreed that the 49th Parallel (degree of latitude) would serve as the boundary between the U. S. and [[British Columbia]] (now part of Canada). The American portion became the states of [[Washington]], [[Oregon]] and [[Idaho]].

After victory the [[Mexican American War]] of 1846-48, the U.S. purchased via the [[Treaty of Guadalupe Hidalgo]] territory that became the states of [[California]], [[Nevada]], [[Utah]], [[Colorado]], [[New Mexico]] and [[Arizona]].  In 1846 the U.S. and Britain agreed that the 49th Parallel (degree of latitude) would serve as the boundary between the U. S. and [[British Columbia]] (now part of Canada). The American portion became the states of [[Washington]], [[Oregon]] and [[Idaho]].