Why did the United States enter World War I, and why did it reject the Treaty of Versailles?
Analyze the origins and impact of US involvement in World War I, including the causes of US entry, the home front and the Great Migration, the Treaty of Versailles, and the rejection of the League of Nations (GSE SSUSH15, Domain 4).
An EOC-level answer on World War I for the Georgia Milestones US History exam: the causes of US entry (submarine warfare and the Zimmermann Telegram), the home front and the Great Migration, the Fourteen Points and the Treaty of Versailles, and the Senate's rejection of the League of Nations, with worked stimulus and technology-enhanced questions.
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What this topic is asking
SSUSH15 covers the origins and impact of US involvement in World War I: why the United States, after years of neutrality, entered the war; the home front and the Great Migration; and the peace, including Wilson's Fourteen Points, the Treaty of Versailles, and the Senate's rejection of the League of Nations. This Domain 4 topic completes Module 4 and confirms the United States as a major world power.
Why the United States entered the war
The home front and the Great Migration
On the home front, the government mobilized the whole society: it sold war bonds, encouraged rationing, used propaganda to build support, and expanded federal power over the economy. Women took on new jobs, strengthening the case for suffrage.
The peace: Fourteen Points, Versailles, and the League
The rejection of the League signaled the isolationism that shaped American foreign policy in the 1920s and 1930s.
Try this
Q1. Identify two reasons the United States entered World War I. [2]
- Cue. German unrestricted submarine warfare (including the sinking of the Lusitania) and the Zimmermann Telegram offering to help Mexico attack the United States; ties of trade and sympathy with the Allies also contributed.
Q2. Explain why the United States did not join the League of Nations. [2]
- Cue. The Senate rejected the Treaty of Versailles, largely because many senators feared the League would drag the nation into future foreign wars and limit its independence, reflecting a turn toward isolationism.
Exam-style practice questions
Practice questions written in the style of GaDOE exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
GA Milestones (US History, style)1 marksThe Zimmermann Telegram and German unrestricted submarine warfare are most often cited asShow worked answer →
A single-select item (Domain 4, SSUSH15).
Correct answer: the immediate causes of US entry into World War I.
Germany's sinking of ships (including the earlier Lusitania) and its secret offer to help Mexico attack the United States pushed the US to declare war in 1917. Markers reward identifying both as causes of US entry. Distractors such as "reasons the US stayed neutral" or "causes of the Great Depression" name the wrong effect.
GA Milestones (US History, TE)2 marksPart A: What did the US Senate decide about the Treaty of Versailles and the League of Nations? Part B: Select the statement that best explains the reason for that decision.Show worked answer →
A two-part evidence-based (technology-enhanced) item (Domain 4, SSUSH15).
Part A (1 point): the Senate rejected the Treaty of Versailles, so the United States did not join the League of Nations.
Part B (1 point): the best statement is that many senators feared the League would drag the United States into future foreign wars and limit its independence, a return to isolationism. Markers reward identifying the rejection and explaining the fear of foreign entanglement.
Related dot points
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An EOC-level answer on American imperialism for the Georgia Milestones US History exam: the causes of overseas expansion, yellow journalism and the Spanish-American War, the acquisition of Puerto Rico, Guam, and the Philippines, the debate over empire, and the Panama Canal, with worked stimulus and technology-enhanced questions.
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An EOC-level answer on the Progressive Era for the Georgia Milestones US History exam: the muckrakers who exposed abuses, trust-busting and consumer-protection laws under Theodore Roosevelt, Woodrow Wilson's reforms and the Federal Reserve, and the Progressive constitutional amendments, with worked stimulus and technology-enhanced questions.
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An EOC-level answer on the Gilded Age economy for the Georgia Milestones US History exam: the entrepreneurs Carnegie and Rockefeller, vertical and horizontal integration, trusts and monopolies, the free enterprise system, the captains of industry versus robber barons debate, and the Sherman Antitrust Act, with worked stimulus and technology-enhanced questions.
- Analyze the impact of immigration and urbanization, including the new immigration from southern and eastern Europe, the growth of cities, nativism, and political machines (GSE SSUSH11 and SSUSH12, Domain 3).
An EOC-level answer on immigration and urbanization for the Georgia Milestones US History exam: the shift from old to new immigration, push and pull factors, the explosive growth of cities and tenements, nativism and the Chinese Exclusion Act, and political machines such as Tammany Hall, with worked stimulus and technology-enhanced questions.
- Analyze the women's suffrage movement and related Progressive social reforms, including the Nineteenth Amendment, the role of leaders such as Susan B. Anthony, and the founding of the NAACP (GSE SSUSH13 and SSUSH17, Domain 3).
An EOC-level answer on woman suffrage and Progressive reform for the Georgia Milestones US History exam: the long campaign for the vote, leaders such as Susan B. Anthony and Carrie Chapman Catt, the Nineteenth Amendment, and the founding of the NAACP, with worked stimulus and technology-enhanced questions.
Sources & how we know this
- United States History Georgia Standards of Excellence (GSE) — Georgia Department of Education (2017)
- Georgia Milestones United States History Study/Resource Guide for Students and Parents — Georgia Department of Education (2022)