World War I and Early 20th Century Terms

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Allies

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The countries that fought against the Central Powers during World War I, including the United States, United Kingdom, France, and others.

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American Expeditionary Force

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The United States Armed Forces sent to Europe during World War I.

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Central Powers

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The coalition of Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria during World War I.

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Moral Diplomacy

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A form of diplomacy proposed by President Woodrow Wilson, promoting democratic ideals and human rights.

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Great Migration

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The movement of African Americans from the rural South to the urban North in the early 20th century.

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League of Nations

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An international organization established after World War I under the Treaty of Versailles to promote peace and cooperation among countries.

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Lusitania

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A British ocean liner sunk by a German U-boat in 1915, influencing the U.S. decision to enter World War I.

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Nineteenth Amendment

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The amendment to the United States Constitution that granted women the right to vote.

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Red Scare

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The fear of communism and radical thought in the United States after World War I.

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Roosevelt Corollary

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An extension of the Monroe Doctrine by President Theodore Roosevelt, asserting the U.S. right to intervene in Latin America.