Sea Biscuit was a famous American racehorse known for his remarkable underdog story during the Great Depression. Born in 1933, he was initially considered a disappointment due to his small size and lack of speed. However, with the help of his trainer, Tom Smith, and jockey, Red Pollard, he transformed into a champion. In the late 1930s, Sea Biscuit gained national attention by winning several major races, including the 1940 Santa Anita Handicap. His success inspired many and symbolized hope and resilience during tough times, making him a beloved figure in American sports history.