James Marshall was an American carpenter and gold miner, best known for his discovery of gold at Sutter's Mill in California in 1848. This event sparked the California Gold Rush, which led to a massive influx of people seeking fortune in the region. Marshall's find was significant in American history, as it transformed the economy and demographics of the West. Born on October 8, 1810, in New Jersey, Marshall moved to California in search of opportunity. Despite his pivotal role in the Gold Rush, he struggled financially and faced many challenges throughout his life. He passed away on August 10, 1885, leaving a lasting legacy in American history.