The Wall Street Crash of 1929, also known as the Great Crash or the Crash of '29, was a major American stock market crash that occurred in the autumn of 1929. It began in September, when share prices on the New York Stock Exchange (NYSE) collapsed, and ended in mid-November. The pivotal role of the 1920s' high-flying bull market and the subsequent catastrophic collapse of the NYSE in late 1929 is often highlighted in explanations of the causes of the worldwide Great Depression.

The history of the lands that became the United States began with the arrival of the first people in the Americas around 15,000 BC. Numerous indigenous cultures formed, and many saw transformations in the 16th century away from more densely populated lifestyles and towards reorganized polities elsewhere. The European colonization of the Americas began in the late 15th century, although most colonies in what would later become the United States were settled after the year 1600.