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U.S. Time Periods
-1607: Three Worlds Meet (23)
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1801-1861: Expansion
84 Resources
Lewis and Clark: Mapping the West
features maps of the famous expedition. The Corps of Discovery collected 30 maps from...
Religion and the Founding of the American Republic
examines the role religion played in the founding of the American colonies, in the...
Grant-Kohrs Ranch
commemorates America's frontier cattle era. The ranch—located north of Yellowstone in...
The Ohio & Erie Canal: Catalyst of Economic Development for Ohio
tells how the construction of this canal transformed one of the poorest states in the...
Smithsonian Institution
Library of Congress
National Park Service
National Park Service
See All 84 1801-1861: Expansion Resources
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