Reshaping the Nation
 (1858-1914)

The Western Frontier
The Growth of Industry
Toward an Urban America (Migration, Immigration)

Reform, Expansion, and War
 (1865-1920))

Progressive Reforms
 Overseas Expansion
 World War I

Turbulent Decades
 (1919-1945)

The Jazz Age
 The Depression and FDR
 World War II
 Holocaust

Turning Points
  (1945-1975))

The Cold War Era
 America in the Fifties
 The Civil Rights Era
 The Vietnam Era

Modern America
  (1968-Present)

Search for Stability (Nixon, Carter)
 New Challenges (Reagan, Bush, Clinton)