1930
- Gandhi's Salt March
- Pluto Discovered
- Stalin Begins Collectivizing Agriculture in the U.S.S.R.
1932
- Air Conditioning Invented
- Amelia Earhart First Woman to Fly Solo Across the Atlantic
- Lindbergh's Baby Kidnapped
- Scientists Split the Atom
- Zippo Lighters Introduced
1934
- Bonnie and Clyde Killed by Police
- Cheeseburger Created
- The Dust Bowl
- The Great Terror Begins in the Soviet Union
- Mao Zedong Begins the Long March
- Parker Brothers Sells the Game "Monopoly"
1936
- Carnegie Publishes How to Win Friends and Influence People
- Hoover Dam Completed
- King Edward VIII Abdicates
- Nazi Olympics in Berlin
- Spanish Civil War Begins
1938
- Broadcast of "The War of the Worlds" Causes Panic
- Chamberlain Announces "Peace in Our Time"
- Evian Conference About Jewish Refugees From Nazi Germany
- "Extinct" Fish Found (Coelacanth)
- Hitler Annexes Austria
- House Un-American Activities Committee (a.k.a. the Dies Committee) Is Established
- March of Dimes Founded
- The Night of Broken Glass (Kristallnacht)
- Snow White and the Seven Dwarfs Is the First Full-Length Animated Cartoon
- Superman First Appears in Comic Books
- Volkswagen Beetle First Produced
- "Wrong-Way" Corrigan Heads to Dublin Instead of New York