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Ratification of the 19th Amendment
Women are given the right to vote when the 19th Amendment to the United States constitution grants universal women's suffrage. Also known as the Susan B. Anthony amendment, in recognition of her important campaign to win the right to vote. -
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Irish Civil War
War between Irish nationalists over whether or not to accept the Anglo-Irish Treaty. Ended in the defeat of the anti-treaty forces. -
Teapot Dome Scandal
Scandal of the early 1920s surrounding the secret leasing of federal oil reserves by the secretary of the interior, Albert Bacon Fall. -
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Calvin Coolidge Presidency
As America’s 30th President, Calvin Coolidge demonstrated his determination to preserve the old moral and economic precepts of frugality amid the material prosperity which many Americans were enjoying during the 1920s era. -
Iron Lung
In order to help Polio victims survive, Philip Drinker and Louis Agassiz Shaw invented the first iron lung at Harvard School of Public Health. It consisted of a huge metal box with a set of bellows attached at one end to pump air in and out. The whole body was enclosed in an airtight chamber, apart from the head. A tight rubber seal supported the neck and ensured that air did not escape. -
The Star-Spangled Banner
President Herbert Hoover signs a congressional act making “The Star-Spangled Banner”, written by Francis Scott Key, the official national anthem of the United States. -
First Helicopter
The VS-300, the world’s first practical helicopter, took flight at Stratford, Connecticut. Designed by Igor Sikorsky and built by the Vought-Sikorsky Aircraft Division of the United Aircraft Corporation, the helicopter was the first to incorporate a single main rotor and tail rotor design. -
Pearl Harbor Attack
Surprise aerial attack on the U.S. naval base at Pearl Harbor on Oahu Island, Hawaii, by the Japanese that precipitated the entry of the United States into World War II. The strike climaxed a decade of worsening relations between the United States and Japan.