US and World History -- Year In Context
(In large part, dates are from  http://wombat.doc.ic.ac.uk/pub/dates)

1850's
1860's
1870's
1880's
1890's
1900's
1910's
1920's        20  21  22 23  24  25
 
 

1920

13 01 1920 NY Times Editorial says rockets can never fly
16 01 1920 Prohibition begins
01 02 1920 the 1st armored car was introduced
08 02 1920 Odessa was taken by the Bolsheviks
24 02 1920 a fledgling German political party holds its first important meeting in Munich. The party would later be called the Nazi Party
19 03 1920 The Treaty of Versailles was rejected by the US Senate
29 07 1920 1st transcontinental airmail flight from New York to San Francisco
18 08 1920 Tennessee became the 36th state to ratify the 19th Amendment, guaranteeing women the right to vote
26 08 1920 19th Amendment brings women the vote
26 08 1920 The 19th amendment on women's suffrage becomes effective
27 08 1920 Mrs. Fay Bridges became 1st woman to vote in a Florida election
08 09 1920 1st US Air Mail service begins
17 09 1920 The American Professional Football Association was formed
28 09 1920 Eight members of the Chicago White Sox were indicted for allegedly throwing the 1919 World Series against the Cincinnati Reds in the "Black Sox" scandal
12 10 1920 The race horse Man O'War's last race
02 11 1920 KDKA (Pittsburgh) on the air as 1st commercial radio station
29 11 1920 Armenia was proclaimed a Soviet Socialist Republic

1921

27 04 1921 Germany's liability was declared to be 6.65 billion pounds by the Reparations Commission
27 05 1921 Afghanistan attains sovereignty
07 06 1921 The first sitting of the Northern Ireland Parliament
07 06 1921 U.S. refuses to recognize the Mexican government
02 08 1921 Several former members of the Chicago White Sox and two others were acquitted in the "Black Sox" scandal1
09 11 1921 Margaret Sanger forms American Birth Control League
06 12 1921 England and Ireland sign a peace treaty

1922

08 02 1922 Radio arrives in the White House
27 09 1922 King Constantine I of Greece abdicates
18 10 1922 British Broadcasting Corporation established
04 11 1922 Howard Carter discovers the tomb of Tutankhamen
24 11 1922 Erskine Childers, Irish nationalist writer, was executed by the Irish in Dublin
29 11 1922 King Tut's tomb opened
01 12 1922 1st skywriting over the US - "Hello U.S.A." - by Capt Turner, RAF
03 12 1922 The first showing of a Technicolor film
20 12 1922 The Union of Soviet Socialist Republics was formed

1923

02 03 1923 Time magazine was first published
13 03 1923 Dr. Lee de Forest demonstrates a sound motion picture system in New York
12 06 1923 Harry Houdini astounds New Yorkers by freeing himself of a straitjacket while upside down 40 feet in the air
20 06 1923 Pancho Villa, robber and revolutionary, was murdered
18 07 1923 Women granted equality in divorce cases by the British Matrimonial Causes Act
29 10 1923 Turkey was proclaimed to have a republican government
06 11 1923 Col. Jacob Schick was issued a patent for the electric razor
08 11 1923 Adolph Hitler and General Ludendorff seize the Munich government

1924

04 01 1924 First auto crosses the Sahara desert
21 01 1924 Vladimir Lenin, the revolutionary, died of a stroke
26 05 1924 Congress sets first immigration quotas
02 06 1924 Native Americans "granted" citizenship
15 06 1924 Congress confers citizenship on (some) Native Americans
15 06 1924 J. Edgar Hoover was appointed as head of the FBI
28 09 1924 Two U.S. Army planes landed in Seattle completing the first round the world flight in 175 days

1925

20 01 1925 British-Chinese Treaty of Peking was signed
15 04 1925 John Singer Sargent, died