The Transcontinental Railroad unites the nation and transforms the Heartland. Native American civilizations decline as farmers settle the continent. Cattle replace wild buffalo as king of the Plains; the Cowboy becomes a new American icon.

America strikes oil and the boom time begins. Henry Ford brings the motorcar to the masses; the nation hits the road. Massive engineering projects modernize the West. Intended to cure vice, Prohibition fuels the growth of organized crime in burgeoning cities.

Boom turns to bust when the stock market crash ushers in the Great Depression. Dust storms blanket the Midwest in darkness. Roosevelt's New Deal signals recovery; thousands find work on projects like the Hoover Dam and Mount Rushmore. Hope for the American future collides with world conflict brewing in Europe.