by Liz Olson The Great Plains is an area of the United States stretching east to west from the Mississippi River to the Rocky Mountains and north to south from Canada to Mexico. Native…
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(Encyclopedia) Custer, George Armstrong, 1839–76, American army officer, b. New Rumley, Ohio, grad. West Point, 1861.
In the reorganization of the U.S. army after the war Custer was assigned to the…
(Encyclopedia) Great Plains, extensive grassland region on the continental slope of central North America. They extend from the Canadian provinces of Alberta, Saskatchewan, and Manitoba south through…
(Encyclopedia) Jurassic periodJurassic periodjərăsˈĭk [key] [from the Jura Mts.], second period of the Mesozoic era of geologic time, lasting from 213 to 144 million years ago. At the start of the…
(Encyclopedia) Cretaceous periodCretaceous periodkrĭtāˈshəs [key], third and last period of the Mesozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table), lasting from…