A map of the United States in 1801. The map is color-coded to show the States and territory of the United States west to the Mississippi River, the British territories of Upper and Lower Canada, Rupert's Land, and the Bahamas, the French...

A map showing the territory of the United States after the annexation of Texas in 1845, and the acquisition of the Oregon Country by treaty with Great Britain in 1846. The map is color-coded to show the possessions of the United States,...

A map of central North America showing territorial claims at the beginning of the French and Indian War in 1755. The map shows the Oregon Country, the Spanish claims to New Spain and Florida, the French claims to Louisiana and Canada,...

A map of the United States in 1850, showing the frontier line, indicate by the thick black line. The map shows the States added to the Union between 1840 and 1850, including Florida (1845), Texas (1845), Iowa (1846), Wisconsin (1848),...

A map of North America showing the foreign possessions in the area of the present United States during the French and Indian Wars (1755-1763) between the French and English. This map is color-coded to show territorial claims at the time...

A map from 1903 of Nevada showing counties and county seats, principal cities and towns, mountain ranges, and rivers. "Nevada, one of the most western of the States of the American Union, was formed from a portion of the territory...

A map of the United States showing the principal trade and westward migration routes between 1840 and 1850. The map shows state and territory boundaries at the time, major cities, ports, outposts, forts, and settlements, rivers, mountain...

A map of North America in 1760 showing the territorial claims at the time. The map is color-coded to show the claims of the French, English, and the Spanish. The Oregon Country is also shown, however this was a region unexplored by the...

A map from 1899 of the United States showing the growth of the nation from the original States in 1783 to the admission of Utah into the Union in 1896. The map shows the Northwest Territory claimed at the end of the American...

A map of the United States during the Presidency of John Quincy Adams (1825&ndash1829) showing the States at the time, the Unorganized Territory of the Louisiana Purchase, and the Oregon Country under joint control with Great Britain.

A brief look at the life of American explorer, Meriwether Lewis. Provides a historical map of the Oregon Territory, a portrait of Lewis, and a photograph from Little Belt Mountain.

A map showing the route and winter camps of the Lewis and Clark explorations from St. Luis in the Louisiana Territory to Astoria on the Pacific in Oregon Country (1803-1806). The map shows natural boundaries of the British possessions...

A map of the United States showing the growth of the nation from 1776-1867. The map is color-coded to show the thirteen original states, the territory acquired by conquest during the revolution and the Treaty of 1783, the Louisiana...

A map of the United States and the Louisiana Territory showing boundary disputes and boundary claims between 1763 and 1809. The map shows the natural boundaries and extent of the original Louisiana Territory claimed by the French, the...

A map from 1912 of the United States showing the territorial acquisitions up to the Gadsden Purchase in northern Mexico in 1853. The map is color-coded to show the territory of the original United States and the Northwest Territory...

A map from 1904 of the United States showing the territorial acquisitions up to the Gadsden Purchase in northern Mexico in 1853. The map is coded to show the territory of the original United States and the Northwest Territory defined by...

A map from 1904 of the United States showing the territorial acquisitions up to the Gadsden Purchase in northern Mexico in 1853. The map is coded to show the territory of the original United States and the Northwest Territory defined by...

A map of the United States and Pacific Ocean showing the development of American interests in the Pacific from the early exploration of Oregon Country in 1791 to the formal annexation of the Midway Islands and the Panama Strip in 1903....

A map of the United States between 1840 and 1850 showing the states and territories, and the principal routes of transportation and westward migration during the period. The map shows frontier forts, outposts, and settlements, the...