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American flag juxtaposed over prairie, symbolizing America "coast to coast."

Working proodection farm in America during the Industrial Revolution

Chinese labor during the building of the Trans-Continental Railroad

U.S. troops bombarding Veracruz during the Mexican-American War

The railroad disrupts nature and bears down on the viewer, with the locomotive's light shining like a jewel. Wild deer scatter to the left, but the cleared field offers no refuge--the stumps, that catch the light of the west-setting sun, and the…

The people shown are the Graysons, and they were part of the great westward expansion of the United States during the mid-1800s.The Graysons traveled overland from Missouri to California in 1846, two years ahead of the Gold Rush that drew so many…

Redefined by territorial expansion in the mid-1800s, the boundary of the American West shifted from the Mississippi River to the Pacific Ocean, fueled largely by exploration and emigration along the Oregon Trail, among others. Over the course of…