Which event marked the beginning of the Great Depression in the United States?

The stock market crash of 1929 is recognized as the event that marked the beginning of the Great Depression in the United States. This crash occurred on October 29, 1929, also known as Black Tuesday, when the stock market experienced a dramatic decline. The sudden loss of confidence in the stock market led to widespread panic selling, resulting in a significant drop in stock prices and causing millions of Americans to lose their investments.

This event had a cascading effect on the economy, leading to bank failures, business bankruptcies, and massive unemployment. The consequences of the crash were severe, as it precipitated a decade-long economic downturn characterized by high unemployment rates and widespread poverty, fundamentally altering the American social and economic landscape.

The other events mentioned do not align with the onset of the Great Depression. The bombing of Pearl Harbor occurred in 1941 and marked the United States' entry into World War II. The end of World War I in 1918 had significant global implications but did not initiate the economic crisis of the 1930s. The implementation of the New Deal started in 1933 as a response to the economic crisis and was aimed at recovery, but it occurred after the Great Depression had already begun.