John C. Fremont's profession was an army officer. He was a notable explorer, military officer, and politician in the 19th century. Fremont gained fame for his expeditions in the American West, particularly in the California and Oregon regions. As an army officer, he played a significant role in mapping these areas and exploring the frontier. Additionally, Fremont later became involved in politics and ran for President of the United States in 1856 as the first Republican candidate.
