Neutral at first, the US was drawn into WWI by a storm of submarine attacks, economic ties, the shocking Zimmerman Telegram, and moral outrage. Behind the decision were not only big headlines, but also quiet bureaucratic choices and shifting public opinion. Explore how this "war to end all wars" reshaped American society — from the trenches to the home front, and from African-American service to global influence.

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List of Sources:

American Entry into World War I | Wikipedia (with multiple external scholarly links and archival material)

Causes of World War I | IN.gov (Indiana State Government)

Changing Technology, Changing Tactics | National WWI Museum and Memorial (with supporting YouTube content and teaching resources)

Fighting for Respect: African-American Soldiers in WWI | Army Historical Foundation

The Influenza Epidemic of 1918 | National Archives

Trench Warfare | National WWI Museum and Memorial

Unit 9 World War I and the Great Migration, 1915–1920 | New Jersey State Library

Zimmermann Telegram | National WWI Museum and Memorial