Updated timelines

Timeline of the 1920s
Line of 1920s
Early Cold War Timeline
Bénin : 25 ans d'alternance
Civil War
Early Astronomers
EM WWII
The Story of Satellites
Sydney Sollars - History of American Education
Early Cold War
Hannah's History of American Education Timeline
events of the 1920s
Timeline of 'To Kill a Mockingbird'
1920's Timeline
Routine Screenings
The Road to the Civil War