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Theodore Roosevelt was elected as the 26th president in 1901 and served until 1909 for two terms. He worked towards progressive reforms and a strong foreign policy. -
In 1903, brothers Orville and Wilbur Wright created a gasoline-powered airplane.
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In 1908, Henry Ford, founder of the Ford Motor Company, released his Model T, a car which gained much success, making cars a common commodity. -
William Howard Taft was elected the 27th President of the United States in 1909 and served until 1913 for one term. -
Woodrow Wilson was elected the 28th president of the United States in 1913 and served until 1921 for two terms. At the beginning of World War I, he tried to keep a neutral policy, but eventually led America into war. -
The 16th Amendment was passed by Congress on July 2, 1909, and was ratified on February 3, 1913. It allowed Congress to have power to collect income taxes.
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Archduke Francis Ferdinand was assassinated by a Serbian, causing Austria-Hungary to declare war on Serbia, igniting World War I. -
The Lusitania, a passenger liner traveling from New York to Liverpool, England, was sunk by a German submarine, resulting in the death of 128 Americans. -
On April 6, 1917, the US declared war on Germany after Germany reinstituted its policy of unrestricted submarine warfare on February 1, 1917.
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Congress passed the 18th Amendment on December 18, 1917, and it was ratified on January 16, 1919. It prohibited the manufacture, sale, and transportation of liquor. -
The Treaty of Versailles was signed by Allied and German representatives, ending World War I and establishing terms of peace.