Book excerpt: Foreword by Richard Dillon. Between 1842 and 1853, John C. Fremont led five expeditions across the trans-Mississippi West. While the success of his early journeys gained him acclaim as a national hero, his later missions ended in tragedy and ultimately a court-martial. Historian Ferol Egan focuses on Fremont’s explorations, providing a vivid portrait of a courageous man in an emerging young nation.