John Fremont
John C. Frémont was an American explorer, military officer, and politician in the 19th century. He is best known for his expeditions in the western United States, which helped map the region and promote westward expansion. Frémont's explorations contributed to the knowledge of the Oregon Trail and the California Gold Rush.
In addition to his exploration work, Frémont was a key figure in the early Republican Party and ran for president in 1856 as its first candidate. He played a significant role in the American Civil War, serving as a Union general. His legacy includes his contributions to American exploration and politics.