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🇺🇸AP US History Review

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Early 20th Century Progressive Era and WWI

Early 20th Century Progressive Era and WWI

Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated August 2025

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The Progressive Movement started with the bullet of an assassin and ended with the presidency of Woodrow Wilson. The Progressive movement had four main goals, and reformers aimed to fix the problems produced by the industrial revolution at the local, state, and national level. The U.S. entry into WWI was caused by untenable position of neutrality. The U.S entered the war on the side of the allies, and emerged a world leader.