Westward Expansion, Industrialisation and the Gilded Age – APUSH, Period 6 Study Notes
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Source: AP US History Study Guide, Arizona State University

Tags: Gilded Age, westward expansion, Dawes Act, industrialisation, robber barons, vertical integration, horizontal integration, Knights of Labor, AFL, Populism, Jim Crow, immigration, urbanisation, 1865-1898

Difficulty: Intermediate | Prerequisites: Period 5 Study Notes

Period 6 covers the transformation of the United States from an agrarian republic into an industrial world power. Westward expansion, mass immigration, urbanisation, corporate capitalism, and the imposition of Jim Crow all happened simultaneously. The exam tests your ability to connect these threads, especially how industrialisation created both enormous wealth and enormous inequality.


TL;DR

Between 1865 and 1898, the United States completed its westward expansion (destroying Indigenous sovereignty in the process), industrialised at breathtaking speed, absorbed waves of immigration, built massive cities, and imposed racial segregation across the South. Corporate titans amassed unprecedented wealth while workers struggled for basic rights. Farmers organised politically through the Grangers, Farmers' Alliances and the Populist Party, but ultimately failed to build a lasting coalition.


Key Terms and Definitions

Dawes Act (1887)

Ended tribal sovereignty and divided Indigenous land into 160-acre parcels for individual families. The government held land in trust for 25 years, after which Indigenous people could become citizens if they abandoned traditional practices. The act halved Indigenous landholdings and undermined social and cultural institutions.

Wounded Knee Massacre (1890)

The 7th Cavalry killed 250 Lakota people, many of them women and children, at Wounded Knee Creek. It marked the effective end of Indigenous armed resistance.

Homestead Act (1862)

Gave settlers 160-acre lots on condition they farm the land. The dry, difficult conditions of the Great Plains meant many failed, and large operations eventually bought up abandoned homesteads.

Chinese Exclusion Act (1882)

Banned Chinese immigration and prohibited Chinese residents from becoming naturalised citizens. It set a precedent for race-based immigration policy.

Vertical Integration

Controlling all phases of production from raw materials to finished product. Andrew Carnegie used this approach in steel, eliminating middlemen and cutting costs.

Horizontal Integration

Acquiring competitors to control a larger share of the market, aiming for monopoly. John D. Rockefeller's Standard Oil controlled four-fifths of the oil industry through this method.

Sherman Antitrust Act (1890)

Outlawed monopolies that prevented free competition in interstate commerce. Rendered largely toothless by the Supreme Court's ruling in US v. E.C. Knight Company (1895), which exempted manufacturing from its reach.

Social Darwinism

The belief, popularised by Herbert Spencer, that economic competition was a natural process of "survival of the fittest." Used to justify inequality, racism and opposition to government regulation.

Gospel of Wealth

Carnegie's argument that the rich should act as stewards of their surplus wealth, investing in public institutions (libraries, universities) rather than giving charity.

Knights of Labor

Founded in 1869, aimed to unite all workers in one national union regardless of skill, race or gender. Declined after the Haymarket affair (1886) associated the labour movement with violence.

American Federation of Labor (AFL)

Founded in 1886 under Samuel Gompers, the AFL organised only skilled white male workers into trade-specific unions. It focused on practical goals: better wages, shorter hours.

Plessy v. Ferguson (1896)

The Supreme Court upheld "separate but equal" racial segregation, providing the constitutional foundation for Jim Crow laws. White southerners enforced the "separate" part without providing the "equal."

Jim Crow Laws

State and local laws enforcing racial segregation in public facilities, transportation, schools, hospitals and graveyards across the South.

Populist Party (People's Party)

Founded in 1892 by farmers' alliances, the party advocated a graduated income tax, the eight-hour workday, government ownership of railroads, direct election of senators, women's suffrage and the free coinage of silver. It declined after the 1896 election.


Core Content

Westward Expansion and Indigenous Resistance (6.1)

  • The federal government facilitated expansion through land grants, railroad subsidies, military campaigns against Indigenous peoples, and territorial governance

  • Bison were central to Plains Indigenous life; by the mid-1800s, relentless hunting by white Americans had killed over 13 million

  • Broken treaties (Fort Laramie, Medicine Lodge) and massacres (Sand Creek, 1864) drove Indigenous resistance

  • The Battle of the Little Bighorn (1876) was the last major Indigenous military victory

  • Assimilation policies: the Dawes Act divided communal lands into individual plots; boarding schools forced Indigenous children to abandon their languages, dress and traditions

  • The Wounded Knee Massacre (1890) ended the period of armed Indigenous resistance

Industry in the West (6.2)

  • Mining attracted prospectors, then became dominated by large companies with industrial equipment; workers earned low wages in dangerous conditions

  • Cowboys were wage workers, not romantic independents; 66% were white, the rest Mexican or formerly enslaved; Black and Mexican cowboys faced wage discrimination

  • The Homestead Act attracted settlers, but dry conditions, debt and falling prices drove many off the land

  • Mormons in Utah faced federal opposition to polygamy; it was banned in the 1890s as a condition for statehood

  • The Chinese Exclusion Act (1882) banned Chinese immigration and set a precedent for race-based exclusion

The New South (6.3)

  • New South proponents like Henry Grady advocated industrialisation (textiles, steel, lumber), but the South remained dependent on northern investment and low wages

  • Disenfranchisement strategies: poll taxes, literacy tests, grandfather clauses

  • Jim Crow laws imposed legal segregation; Plessy v. Ferguson (1896) upheld "separate but equal"

  • Lynching enforced racial boundaries: over 1,700 people were lynched in the South between 1884 and 1900

American Industrialisation (6.4)

  • Railroads drove industrial growth, consuming steel, wood, coal and rubber

  • Key technologies: Bessemer steel process, telegraph, telephone (Alexander Graham Bell), Edison's research laboratory (phonograph, electricity, motion pictures)

  • Captains of industry / robber barons: Carnegie (steel, vertical integration), Rockefeller (oil, horizontal integration), J.P. Morgan (banking, consolidation), Jay Gould (railroads)

  • The Sherman Antitrust Act (1890) was undermined by court rulings

Gilded Age Ideologies (6.9)

  • Laissez-faire: Adam Smith's idea that the marketplace should regulate itself without government interference

  • Social Darwinism justified inequality as a natural outcome of competition

  • The Gospel of Wealth softened the message: Carnegie argued the rich had a duty to invest in public institutions

  • Critics like Lester Frank Ward argued government had a responsibility to protect citizens from "the aggressive greed of the favoured few"

Working People Organise (6.5)

  • Industrial workers faced low wages, long hours, dangerous conditions, child labour, racial and gender pay disparities

  • The Knights of Labor aimed to unite all workers; declined after the Haymarket affair (1886)

  • The AFL organised only skilled white male workers and focused on wages and hours

  • Major strikes: Great Railroad Strike (1877), Homestead Strike (1892), Pullman Strike (1894)

  • Eugene Debs was jailed under the Sherman Antitrust Act after the Pullman Strike and later founded the Socialist Party

  • The Industrial Workers of the World (IWW, "Wobblies") sought to unite all workers to overthrow capitalism

Immigration (6.6)

  • After 1880, the origin of immigrants shifted from northern and western Europe to southern and eastern Europe (Greece, Austria-Hungary, Poland, Russia)

  • Immigrants built community institutions: mutual aid societies, churches, newspapers in their own languages

  • Nativism: the belief that foreigners threatened American society. Led to the Chinese Exclusion Act and calls for immigration restriction

  • Eugenics, a pseudoscience advocating selective breeding, was embraced by many nativists

Urbanisation (6.7)

  • Industrialisation pulled people from farms to cities; African Americans migrated north seeking better employment and escaping Jim Crow

  • Suburbs grew as electric trolley lines allowed middle-class workers to live farther from city centres

  • Jacob Riis's How the Other Half Lives (1890) documented tenement conditions in New York

  • Political machines (Tammany Hall) provided services to the urban poor in exchange for votes but fostered corruption

  • Settlement houses (Hull House, Jane Addams) offered social services and pushed for reform

Politics and Protest (6.10)

  • Farmers faced falling crop prices, rising debt and the power of railroads and grain elevators

  • The Grangers organised cooperatives and lobbied for railroad regulation

  • Farmers' Alliances proposed the sub-treasury system and the free coinage of silver

  • The Populist Party (1892) advocated a graduated income tax, the eight-hour day, direct election of senators and women's suffrage

  • The Populist Party declined after 1896 due to racial divisions, the economic recovery, and failure to attract industrial workers


Common Misconceptions

  • Students often treat industrialisation as purely negative. It created enormous wealth, new technologies, and job opportunities alongside exploitation and inequality. The exam expects you to evaluate both sides.

  • Jim Crow was not just a southern phenomenon. Northern cities also practised racial discrimination in housing, employment and criminal justice.

  • The Populist Party was not simply a farmers' protest movement. It had a sophisticated platform that anticipated many Progressive Era reforms, including the graduated income tax and direct election of senators.


Why It Matters / Exam Flags

  • Compare the experiences of different groups in the West: Indigenous peoples, Chinese immigrants, Mexican Americans, African Americans, Mormons, white settlers. This is a favourite comparison topic.

  • Know the difference between vertical and horizontal integration and be able to connect them to specific industrialists (Carnegie, Rockefeller).

  • The progression from the Knights of Labor to the AFL to the IWW reflects the evolving strategies of organised labour. Understand why each approach succeeded or failed.

  • Plessy v. Ferguson and Jim Crow connect directly to the Civil Rights Movement in Periods 8-9.


Quick Self-Test

  1. Fill in the blank: The __________ Act of 1887 divided Indigenous tribal land into individual 160-acre plots. (Dawes)

  1. True or False: The AFL admitted women and African Americans as members. (False. It organised only skilled white male workers.)

  1. Fill in the blank: __________ v. Ferguson (1896) upheld the principle of "separate but equal." (Plessy)

  1. True or False: The Sherman Antitrust Act effectively broke up most monopolies in the 1890s. (False. Court rulings rendered it largely toothless.)

  1. Fill in the blank: The __________ Party advocated a graduated income tax, the eight-hour workday and the free coinage of silver. (Populist)


Practice Q&A

Q: How did federal policy toward Indigenous peoples change from the reservation system to the Dawes Act?

A: The reservation system confined Indigenous nations to designated lands, but failed to prevent white encroachment. The Dawes Act (1887) went further by ending tribal sovereignty entirely, dividing communal land into individual plots and requiring the abandonment of Indigenous cultural and religious practices. Boarding schools reinforced this assimilation agenda. The result was a massive loss of land (from 138 million acres to 77 million) and the destruction of social institutions.

Q: Compare the goals and strategies of the Knights of Labor and the American Federation of Labor.

A: The Knights of Labor sought to unite all workers (skilled and unskilled, men and women, Black and white) in one organisation to challenge corporate capitalism. The AFL, by contrast, organised only skilled white male craftsmen into trade-specific unions and pursued pragmatic goals (wages, hours) through collective bargaining and strikes. The Knights declined after the Haymarket affair linked them to violence; the AFL grew to one million members by 1900 precisely because its narrower focus was more sustainable.


Connections to Other Topics

Jim Crow and disenfranchisement connect directly to the Civil Rights Movement (Period 8). Populist demands (graduated income tax, direct election of senators, railroad regulation) were adopted by the Progressive movement (Period 7). The debate over laissez-faire vs government regulation continues through the New Deal (Period 7) and into the modern era. Immigration restriction policies (Chinese Exclusion Act) anticipate the National Origins Act of 1924 (Period 7).


Related Terms / Search Tags

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