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The League of Nations is established with the ratification of the Treaty of Versailles
It ended the hostilities of World War I -
Period: to
1920s
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A national quota system
The US had a quota system getitng a total of the number of immigrants. -
Insulin
a hormone that was discovered in dogs which was used to treat diabetes -
The Scopes Trial
John Scopes was accused of teaching evolution -
Calvin Coolidge wins his first election as President
He won with the Republican side. -
Radiovision is born
synchronized pictures and sound for five miles from Anacostia to Washington, D.C -
The Grand Ole Opry transmits its first radio broadcast
It had made its first debut -
Martin Luther King is born
The future civil rights leader -
The Teapot Dome scandal comes to a close
Albert B. Fall, the former Secretary of the Interior, is convicted of accepting a $100,000 bribe for leasing the Elk Hills naval oil reserve -
Blue Tuesday
Black Tuesday was a name given to the day the stock market crashed and everyone who had stocks lost everything. -
First success in the invention of television
The first television was invented and had a patent on it 3 years later
