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Welcome! Let's explore why World War I began and how the United States moved from neutrality to global action.
World War I began in Europe in 1914 due to four main long-term causes: Militarism, Alliances, Imperialism, and Nationalism (M-A-I-N). When a Serbian nationalist assassinated Archduke Franz Ferdinand, network alliances quickly pulled major European nations into conflict.
At first, the United States remained neutral. However, unrestricted German submarine warfare and the secret Zimmermann Telegram—which suggested a military alliance between Germany and Mexico—forced President Woodrow Wilson to ask Congress to declare war in 1917.
After the war ended in 1918, Americans debated their future role in world affairs. Many senators embraced isolationism, fearing that joining the League of Nations would drag the U.S. into future foreign wars without congressional approval.
Analyze why the U.S. Senate rejected the Treaty of Versailles and refused to join the League of Nations post-WWI.
- Step 1: Identify the main issue. President Wilson wanted to join the League of Nations to keep global peace.
- Step 2: Examine the main foreign policy debate. Isolationism vs. Internationalism.
- Step 3: Analyze the concern of U.S. Senators. They feared Article X of the League covenant would force the U.S. to fight in foreign wars without a vote from Congress.
- Step 4: Conclude cause and effect. Due to strong isolationist beliefs, the Senate rejected the treaty to preserve national sovereignty.
