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February 8, 1910 - The Boy Scouts of America is founded.
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May 11, 1910 - The start of American domestic tourism occurs with the establishment of Glacier National Park in Montana. Spurred by the development of the Great Northern Railroad, this park helped begin the See America First campaign to encourage United States tourists before and during World War I to visit the western states and territories
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May 25, 1910 - The only flight taken together by Wilbur and Orville Wright occurs at Huffman Prairie Flying Field in Dayton, Ohio. Later that same year, on November 7, the first flight to carry freight would depart from Huffman and deliver its cargo to Columbus, Ohio.
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January 18, 1911 - In San Francisco harbor, Eugene B. Ely lands his plane on the deck of the USS Pennsylvania for the first landing of a plane on a ship.
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May 15, 1911 - Standard Oil is declared an unreasonable monopoly by the United States Supreme Court and ordered dissolved under the powers of the Sherman Antitrust Act.
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September 17, 1911 - Technology moves forward. The first transcontinental airline flight was begun in New York by C.P. Rodgers. It would complete its journey to Pasadena, California after numerous stops and 82 hours and 4 minutes in the air on November 5. On October 10, Henry Ford patents the Automotive Transmission, Patent #1,005,186.
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March 12, 1912 - The American Girl Guides, renamed the Girl Scouts one year later, is formed in Savannah, Georgia.
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August 14, 1912 - The United States Marines are sent to action in Nicaragua due to its default on loans to the United States and its European allies.
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November 5, 1912 - In the first election of a Democratic candidate since 1892, Woodrow Wilson overcame a three way race for the presidency when former President Teddy Roosevelt donned the nomination of the Progressive Party to tackle the election against Wilson and incumbent President and Republican William Howard Taft. This split caused the election of Wilson, who garnered 435 Electoral College votes to 88 for Roosevelt and only 8 for Taft.
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July 3, 1913 - The 50th Anniversary of the Battle of Gettysburg commemorates the Civil War battle. It draws thousands of remaining veterans of the battle and their families to the site of the Gettysburg Address and the northernmost battle of the war.