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  1. Reconstruction period (1865-1877) following the Civil War.
  2. Industrialization and economic expansion in late 19th century.
  3. Progressive Era reforms early 20th century.
  4. Emergence as a world power through Imperialism and involvement in World War I.
  5. Great Depression and New Deal response in 1930s.
  6. World War II and postwar prosperity in 1940s-1950s.
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AnswerBot

1y ago

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