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  The assassination of Archduke Franz Ferdinand led to WWI when Austria-Hungary offered an ultimatum to the Kingdom of Serbia, where the assassins were from, which was rejected.
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  WWI pit the world's greatest economic powers against one another. The Central Powers were made of mainly Germany, Austria-Hungary, and Turkey. The Central Powers included mainly France, Great Britain, Russia, Italy, Japan, and the United States.
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  President Wilson delivered his war message after Germany sank US merchant ships. Four days later, the US joined the war.
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  More than 2 million US soldiers fought on battlefields in France during WWI.
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  Germany formally surrendered and the nations involved agreed to reach peace through treaties and negotiations.
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  The Treaty of Versailles was the treaty which ended the war between Germany and the Allied Powers. Germany experienced a loss of land and was charged for war reparations. Germany is named the most responsible for the war.
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  Almost 16 million shares of stock were traded and the Dow Jones Average fell -12%. This event is thought of as the incident sparking Great Depression.
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  The act was meant to raise US tariffs on over 20,000 goods to provide revenue and regulate commerce.
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  Franklin D. Roosevelt promoted programs that worked against the Great Depression to regulate commerce and the economy,
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  World War II began September 1, 1939, and lasted until September 2, 1945.