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March Madness is an annual college basketball tournament held in March in the United States. It features 68 of the best college basketball teams in the country competing in a single-elimination format to determine the national champion. The tournament has become known for its unpredictability and upsets, with fans filling out brackets to try and predict the outcomes of each game. March Madness is a highly anticipated event in the world of college sports, drawing in millions of viewers and generating excitement across the country.