Maine Boundary Controversy, 1782–1842
A map of the New Brunswick and Maine region showing the area of boundary dispute between the end of the American Revolution in1782 and the Webster–Ashburton Treaty of 1842. The map shows the various boundary claims during this period, terrain a...

The Territory of the Present United States after September 3, 1783
The territory of the (then-) present United States after September 3, 1783, color-coded to distinguish various claims to United States....

North American Colonies, 1783
A map of eastern North America in 1783 at the end of the American Revolutionary War, showing the territory of the newly formed United States as proposed by the Treaty of Paris, the Canadian border extending to the Ohio River proposed by the British i...

United States of America, 1783
Eastern North America shortly after the American Revolution, showing territory held by the United States, Britain, and Spain....

Oregon Controversy, 1792–1846
A map of the Oregon Territory between the time of exploration by George Vancouver (1792) and the Oregon Treaty of 1846. The map is color–coded to show the disputed claims of the British and United States, the Russian American line of 1825, the ...

Northwest Territory, 1795
The Ohio Valley and Great Lakes region after the French and Indian War (1754–1763). The Northwest Ordinance of 1787 was the first organization of land in the United States after the first 13 colonies. This ordinance set the important precedenc...

The Maine Boundary Dispute, 1798–1842
A map of the Quebec, New Brunswick, and Maine area showing the boundary dispute between England and the United States between 1798 and 1842. The map is color–coded to show the boundary claims of the British and United States after 1798, and the...

North America, 1800
A map of North America and Central America showing territorial claims and possessions in 1800. The map is color–coded to show the territories of the United States, British, Spanish, French, and Russians, and indicates areas of disputed claims i...

The Mexican War, 1803–1848
A map of northern and central Mexico and southern United states showing the area of conflict during the Mexican–American War (1846–1848). The map shows the Mexican boundary (under Spain) established by the Louisiana Purchase (1803) before...

Routes of Lewis and Clark, 1804–1805
A map of western North America showing the routes of exploration by Meriwether Lewis and William Clark (1803–1806), and Zebulon Pike (1806–1807). The map shows the newly purchased Louisiana Territory, the Indian Territory east of the Miss...