Adolf Hitler founded The Nazi Party in Munich, Germany.
Spain founded the Spanish Legion; an army unit made up of foreign soldiers.
The first council meeting of the League of Nations was held in Paris.
The Treaty of Versailles takes effect.
Lady Nancy Astor was sworn in, making her the first female member of British Parliament.
Lady Nancy Astor became the first woman to become a member of the British House of Commons.
The Volstead Act is Passed, Marking the Beginning of Prohibition.
World's first transcontinental air race.
The Netherlands' flag carrier airline was founded under the name KLM Royal Dutch Airlines.
The first daily passenger air service began, going from London to Paris.
Afghanistan Gains Independence From the United Kingdom.
Alcock and Brown take off for the first non-stop transatlantic flight.
Mustafa Kemal Atatürk sets off the Turkish War of Independence.
Albert Cushing Read takes off on the first transatlantic flight in history.
Leslie Irvin makes the world's first free-fall parachute jump.
British troops massacre around 400 unarmed civilians in India.
Benito Mussolini led a fascist political rally in Milan, Italy.
The Paris Peace Conference began in France.
Alcohol became illegal in most states of America.
Greater Poland Uprising of 1918–1919 begins.
The Kingdom of Iceland was first established.
The people of Latvia gathered together to proclaim the Republic of Latvia as an independent nation.
Poland became an independent country.
The Spanish Flu was reported to have killed 21,000 people in the US in the week ending on this date.
Czechoslovakia gains independence as Austria-Hungary breaks up.
Stonehenge was given over to the British Government by its private landowner.
American Army Corporal Alvin York and seven men attacked a major German gun nest on their own during World War I.
The musical 'Sometime' put on its first performance at the Shubert Theatre on Broadway, New York City, US.
Fanny Kaplan, a Ukrainian Jewish Socialist Revolutionary, attempted to assassinate Vladimir Lenin.
The musical 'Yip! Yip! Yaphank!' by Irving Berlin premiered at the Century Theatre in New York City.
First Woman enlists in the United States Marines.
The first US airmail stamps were issued, costing 24 cents.
The Red Baron is killed.
Nazi-German ace fighter pilot, The Red Baron, shot down his final two victims.
The US daylight saving time went into effect.
The Standard Time Act was signed into US law, introducing Daylight Saving Time.
Moscow becomes Russia's capital city.
The Spanish Flu received its first case in the US.
The first documented cases of the Spanish flu herald a deadly worldwide pandemic.
In the United Kingdom, women over the age of 30 were granted the right to vote.
The state of Mississippi became the first to accept the prohibition of alcohol.
The play 'Why Marry?' opened at the Astor Theatre in New York City.
Finland declared its independence from the Russian Empire.
41 Suffragists were arrested at the White House, Washington, D.C.
The Bolsheviks, led by Vladimir Lenin, and the workers' soviets overthrew the Russian Provisional Government in Petrograd.
Balfour Declaration letter written.
American suffragist Alice Paul was sentenced to seven months in prison for obstructing traffic in Washington caused by the Women's Rights march she organized.
Third Battle of Ypres begins in Flanders
Dutch exotic dancer Mata Hari was put on trial in Paris after being accused of being a spy.
The British Royal family changed their surname to Windsor.
