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League of Nations
League of Nations is established after the Treaty of Versailles to promote peace. -
Women’s Right to vote
19th Amendment to the U.S. Constitution is ratified, granting women the right to vote. -
"Return to Normalcy"
Warren G. Harding wins the U.S. presidential election, promising a "return to normalcy." -
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Washington Naval Conference
Washington Naval Conference begins, leading to several disarmament treaties. -
Benito Mussolini marches in Rome
Benito Mussolini marches on Rome, marking the beginning of Fascist rule in Italy. -
Irish State
The Irish Free State was established, gaining independence from the United Kingdom. -
Calvin Coolidge Presidency
President Warren G. Harding dies, and Calvin Coolidge becomes the 30th U.S. President -
Beer Hall Putsch
Beer Hall Putsch in Germany—Adolf Hitler's failed attempt to overthrow the Weimar government. -
Vlaimir Lenin’s Death
Vladimir Lenin dies, leading to Joseph Stalin's rise in the Soviet Union. -
Iran’s First Shah
Reza Khan seizes power in Iran, becoming Shah and modernizing the country. -
Locarno Treaties
Locarno Treaties are signed, securing post-World War I borders in Europe. -
Birth of Queen Elizabeth II
Birth of Queen Elizabeth II (then Princess Elizabeth). -
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General Strike in Great Britain
General Strike in the United Kingdom involves industrial workers protesting for better wages. -
Charles Lindberg’s First Transatlantic Flight
Charles Lindbergh completes the first solo nonstop transatlantic flight from New York to Paris. -
First Antibiotic
Alexander Fleming discovers penicillin, revolutionizing medical science. -
President Hoover
Herbert Hoover is elected U.S. President. -
Lateran Treaty
The Lateran Treaty is signed, establishing Vatican City as an independent state. -
The Great Depression
Black Thursday occurs, marking the beginning of the Wall Street Crash and the Great Depression.