Well for starters WWII was a pretty huge historical event. The Cold War was a pretty significant event too. Those are the two biggest I can think of just off the top of my head.
The event is called Black Tuesday
The stock market crash..!!
the stock market crash of 1929
The Great Stock Market Crash of 1929 occurred on "Black Tuesday."
The historical event that occurred just before the story of To Kill a Mockingbird is the Great Depression, which lasted from 1929 to the early 1940s. This economic crisis had a significant impact on the setting of the novel and the lives of the characters in the story.
The event that occured on October 29, 1929, was the beginning of the Great Deppresion, otherwise known as the Wall Street Crash. It was when the Stock market completely crash, and this trainwreck paved the way for America and most of the world into the Great Deppresion
The Stock Market crash that occurred on October 29, 1929 is primarily responsible. It soon led to the worldwide economic downturn known as the Great Depression.
Jacksonville Historical Society was created in 1929.
The crash of 1929/Great Depression led to the creation of the SEC. One of the main reasons it was created was to regulate the stock market.
Inestments in new plants
The stock market crash of 1929 preceded the "dust bowl", an extensive period of drought in the midwest, which began in 1930.
The St. Valentine's Day Massacre occurred on February 14, 1929.