Unit 6: Period 6 (1865–1898)

AP US History: 56 practice questions with detailed explanations.

Unit Study Guide

Executive Summary

Period 6 covers the Gilded Age: explosive industrialization, urbanization, immigration, western settlement, and the labor and farmer protests they spawned.

Industrialization

Railroads knitted the nation; steel (Carnegie) and oil (Rockefeller) built corporate giants through vertical and horizontal integration. The rise of trusts and monopolies prompted the Sherman Antitrust Act (1890). Inventors — Edison, Bell — transformed daily life. Social Darwinism and the gospel of wealth justified inequality.

Urbanization and immigration

Cities swelled with rural migrants and the 'new immigration' from southern and eastern Europe. Tenements, political machines (Tammany Hall), and settlement houses (Jane Addams's Hull House) defined urban life. Nativism targeted the newcomers.

The West

Homesteaders, railroads, and mining transformed the Plains. Native resistance — the Battle of Little Bighorn (1876) — ended with defeat at Wounded Knee (1890) and the Dawes Act's assimilation policy. The frontier closed in 1890 by the census's reckoning.

Gilded Age politics

Parties were closely balanced; patronage and corruption (Credit Mobilier, Tweed Ring) marked the era. Civil service reform (Pendleton Act, 1883) began cleaning house. Tariffs, currency (gold vs silver), and regulation divided the parties.

Labor and farmer movements

Workers organized — Knights of Labor, AFL — and struck (Haymarket 1886, Homestead 1892, Pullman 1894). Farmers formed the Grange and Populist Party, demanding railroad regulation, silver coinage, and reform. The Populists' 1896 defeat at Bryan's hands closed the era, but many demands later became law.

Exam traps

Vertical integration controls supply chains; horizontal integration buys competitors — don't mix them. Social Darwinism misapplied evolution to justify inequality. The Dawes Act intended assimilation but broke up tribal lands. The 'Gilded Age' term is Twain's — gold on the surface, corruption beneath.

Top 5 Concepts to Master

  1. 1Distinguish vertical from horizontal integration.
  2. 2Connect railroads to national market integration.
  3. 3Describe urban life: machines, tenements, settlement houses.
  4. 4Explain the Dawes Act and Wounded Knee.
  5. 5Trace labor and Populist grievances to later reforms.

Key Terms & Definitions

Practice with Flashcards
Gilded Age

Twain’s term for the era’s gilded corruption (1870s–90s).

Vertical integration

Controlling all production stages (Carnegie steel).

Horizontal integration

Buying competitors to monopolize (Rockefeller oil).

Sherman Antitrust Act

1890 law against monopolistic combinations.

Social Darwinism

Survival-of-the-fittest ideology justifying inequality.

New immigration

Late-1800s wave from southern and eastern Europe.

Political machine

Patronage organization trading services for votes.

Hull House

Addams’s settlement house aiding immigrants.

Dawes Act

1887 law breaking up tribal lands for assimilation.

Wounded Knee

1890 massacre ending Plains Indian resistance.

Pendleton Act

1883 civil-service reform ending some patronage.

Knights of Labor

Inclusive early labor union.

AFL

Skilled-workers federation led by Gompers.

Populist Party

Farmers’ party demanding silver and railroad reform.

Common Misconceptions: Exam Traps

Industrialists’ fortunes were pure luck or theft.

Correct: They combined innovation, ruthlessness, and integration — complex figures, not one-note villains.

The Sherman Act broke up trusts immediately.

Correct: Courts first used it against unions; enforcement came later.

The Dawes Act protected Native lands.

Correct: It divided and sold tribal lands, shrinking reservations.

All workers opposed industrialization.

Correct: Many sought better conditions within industry via unions, not its abolition.

The Populists failed entirely.

Correct: They lost 1896 but seeded Progressive-era reforms.

Question Bank Breakdown

By difficulty

easy 19medium 25hard 12

By topic

Gilded Age Politics 15Industrialization 14Westward Expansion After the Civil War 9Labor Movements 8Urbanization 7Immigration 7

All Questions in this Unit