The Dual Vision of a Frontier Chronicler Seth Eastman lived a life defined by the striking duality of the sword and the brush. As a West Point graduate and a distinguished officer in the United States Army, his early years were forged in the crucible of military discipline and the rugged expanses of the American frontier. During the Mexican-American War, Eastman did not merely navigate challenging terrains as a soldier; he observed them with the keen, analytical eye of a mapmaker. This period of service, marked by bravery and leadership, provided him with a unique vantage point—a perspective…