Comprehensive Period 7 APUSH Review Guide: Master 1890–1945 For The May 2026 Exam

Period 7 of the AP U.S. History (APUSH) curriculum is widely considered the most critical era for students to master. Spanning from 1890 to 1945, this period covers the United States’ transformation from a burgeoning industrial power into a global superpower. For students preparing for the May 2026 AP Exam, understanding the nuances of this era is essential, as it typically accounts for 17% to 21% of the total exam weight. This review provides the technical depth and historical analysis required to excel in the stimulus-based multiple-choice questions (MCQs), Short Answer Questions (SAQs), and the Document-Based Question (DBQ) sections.

The Dawn of American Imperialism: 1890–1917

The year 1890 marks a symbolic turning point with the closing of the frontier, as noted by Frederick Jackson Turner’s Thesis. As the domestic "safety valve" closed, American economic and political interests shifted outward.

Motivations for Expansion

By the mid-1890s, the U.S. sought new markets for its industrial surplus and raw materials. This economic drive was complemented by ideological justifications, including Social Darwinism and the belief in "Anglo-Saxon superiority." Alfred Thayer Mahan’s The Influence of Sea Power Upon History provided the strategic blueprint, arguing that national greatness required a powerful navy and overseas coaling stations.

The Spanish-American War and Its Aftermath

The 1898 conflict with Spain was the catalyst for the U.S. becoming a true empire. Triggered by "Yellow Journalism" and the mysterious sinking of the USS Maine, the war resulted in the acquisition of Puerto Rico, Guam, and the Philippines. This expansion sparked an intense national debate. The Anti-Imperialist League argued that governing people without their consent violated the fundamental principles of the Declaration of Independence. Conversely, proponents argued that the U.S. had a moral obligation to "civilize" others, a sentiment echoed in the annexation of Hawaii and the Open Door Policy in China.

The Progressive Era: Reform and Domestic Transformation

Running concurrently with imperialism was the Progressive Era (1890–1920), a diverse movement aimed at addressing the ills of industrialization, urbanization, and political corruption.

Goals and Muckrakers

Progressivism was not a monolithic movement but a collection of efforts by middle-class reformers. Muckrakers—investigative journalists like Ida Tarbell (who targeted Standard Oil) and Upton Sinclair (whose The Jungle led to the Meat Inspection Act)—exposed systemic failures. The focus was on "scientific management" and professionalizing government to increase efficiency and social justice.

The Three C’s and the Square Deal

The presidency of Theodore Roosevelt defined the era’s federal approach through his "Square Deal."

1. Conservation of Natural Resources: Establishing the National Park Service and protecting millions of acres of land.
2. Control of Corporations: Utilizing the Sherman Antitrust Act to distinguish between "good" and "bad" trusts (trust-busting).
3. Consumer Protection: Ensuring the safety of food and medicine through federal oversight.

Constitutional Transformations

The legacy of this period is cemented by four critical amendments:

• 16th Amendment: Federal income tax.
• 17th Amendment: Direct election of U.S. Senators.
• 18th Amendment: Prohibition of alcohol.
• 19th Amendment: Women’s suffrage (ratified in 1920).

World War I and the End of Neutrality

When war broke out in Europe in 1914, President Woodrow Wilson initially advocated for neutrality. However, a combination of unrestricted submarine warfare (the sinking of the Lusitania and Sussex), the Zimmermann Telegram, and economic ties to the Allies forced the U.S. into the conflict in 1917.

The Home Front and Civil Liberties

The war necessitated total mobilization. The Committee on Public Information (CPI) used propaganda to build support, while the Espionage and Sedition Acts were used to suppress dissent. The Supreme Court upheld these restrictions in Schenck v. United States (1919), establishing the "clear and present danger" test, which remains a cornerstone of constitutional law.

The Treaty of Versailles and the League of Nations

Wilson’s "Fourteen Points" sought a peace without victory, centered on the League of Nations. However, the U.S. Senate, led by Henry Cabot Lodge and the "Irreconcilables," rejected the treaty. This rejection signaled a return to isolationism that would characterize American foreign policy throughout the 1920s.

The Roaring Twenties: A Decade of Conflict

The 1920s are often remembered for jazz and flappers, but the decade was defined by deep cultural tensions between traditional rural values and modern urban culture.

Cultural and Social Shifts

The "Great Migration" saw millions of African Americans move from the rural South to Northern cities, leading to the Harlem Renaissance—a flourishing of Black artistic and intellectual life. Simultaneously, the "New Woman" challenged traditional gender roles, while the First Red Scare and the trial of Sacco and Vanzetti highlighted a growing nativism that culminated in the restrictive Immigration Act of 1924 (National Origins Act).

Economic Boom and Bust

The decade saw massive industrial growth driven by the assembly line and consumer credit. However, this prosperity was uneven. Farmers suffered from overproduction, and the lack of regulation in the stock market led to the catastrophic Crash of 1929.

The Great Depression and the New Deal Revolution

The 1929 crash triggered a decade-long economic collapse characterized by 25% unemployment and the failure of thousands of banks.

The New Deal: Relief, Recovery, and Reform

Franklin D. Roosevelt (FDR) took office in 1933, promising a "New Deal" for the American people. Unlike his predecessor, Herbert Hoover, who favored "rugged individualism" and limited federal intervention, FDR utilized the power of the federal government to stabilize the economy.

The First New Deal (1933–1934) This phase focused primarily on immediate relief and economic recovery. The Emergency Banking Act stabilized the financial system, while the Civilian Conservation Corps (CCC) and the Public Works Administration (PWA) provided jobs for the unemployed. The Agricultural Adjustment Act (AAA) sought to raise crop prices by paying farmers to reduce production.

The Second New Deal (1935–1938) This phase moved toward long-term reform and social safety nets. The Social Security Act of 1935 created a system of old-age pensions and unemployment insurance. The Wagner Act (National Labor Relations Act) protected the right of workers to unionize and bargain collectively, leading to a massive increase in union membership under the CIO.

The Shift in the Political Landscape

The New Deal created the "New Deal Coalition," realigning American politics. This coalition brought together labor unions, African Americans, Southern whites, and urban immigrants under the Democratic Party umbrella—a realignment that would dominate American politics for decades.

World War II: The Path to Global Superpower

By the late 1930s, the rise of fascism in Europe and Japanese militarism in the Pacific threatened global stability. While the U.S. initially passed a series of Neutrality Acts to avoid another European war, FDR gradually moved the nation toward intervention through the "Cash and Carry" policy and the Lend-Lease Act (1941), turning the U.S. into the "Arsenal of Democracy."

The Home Front and Total War

The Japanese attack on Pearl Harbor (December 7, 1941) united the nation. The war effort ended the Great Depression as industrial production shifted entirely to military needs. This period saw significant social changes:

• Women in the Workforce: "Rosie the Riveter" became the symbol of women taking industrial jobs.
• Civil Rights: A. Philip Randolph’s threat of a march on Washington led to Executive Order 8802, banning discrimination in defense industries.
• Japanese Internment: In one of the most controversial moves of the era, Executive Order 9066 forced over 110,000 Japanese Americans into relocation camps, a move later upheld by the Supreme Court in Korematsu v. United States (1944).

Ending the War and the New World Order

The U.S. played a decisive role in the Allied victory through the D-Day invasion and the "Island Hopping" strategy in the Pacific. In 1945, the development of the atomic bomb via the Manhattan Project led to the surrender of Japan. As Period 7 concludes, the U.S. emerges from the war as the world's preeminent economic and military power, helping to establish the United Nations and setting the stage for the Cold War in Period 8.

Period 7 Review FAQ for the 2026 AP Exam

What are the most likely DBQ topics for Period 7 in 2026?

The 2026 exam is likely to focus on the shift in the role of the federal government during the New Deal or the tension between isolationism and interventionism in the lead-up to both World Wars. Students should be prepared to analyze how federal power expanded to address economic and global crises between 1890 and 1945.

How did the Progressive Era differ from the New Deal?

While both eras expanded federal power, the Progressive Era focused on refining capitalism through regulation and moral reform (like Prohibition), whereas the New Deal focused on providing a direct economic safety net and relief to individuals. The New Deal was a response to an acute economic collapse, while Progressivism was a response to the long-term effects of industrialization.

Why is 1890 considered the start of Period 7?

The year 1890 is the starting point because it represents the end of the Indian Wars (Wounded Knee) and the closing of the American frontier. This closure forced the United States to look beyond its borders for economic and territorial growth, leading directly to the era of Imperialism.

What was the significance of the "Great Migration" during this period?

The Great Migration was the movement of millions of African Americans from the South to Northern and Western cities to escape Jim Crow laws and find industrial jobs. This demographic shift fundamentally changed the culture of American cities and led to the Harlem Renaissance and the foundations of the modern Civil Rights Movement.

How should I study the "Neutrality" vs "Intervention" debate for the 2026 exam?

Focus on the specific legislative shifts between 1935 and 1941. Understand how the Neutrality Acts were gradually dismantled via "Cash and Carry," the "Destroyers for Bases" deal, and finally "Lend-Lease." This progression is a common focus for stimulus-based multiple-choice questions regarding foreign policy evolution.

As you finalize your study plan for the May 2026 APUSH exam, remember that Period 7 is the "pivot point" of American history. Success requires more than memorizing dates; you must understand the continuity and change in how the United States defined its role both at home and on the world stage. Review the primary documents—such as FDR’s Four Freedoms speech and Wilson’s Fourteen Points—and practice connecting these themes to the broader narrative of American development.