William H. Emory - U.S. Border Surveyor and Civil Engineer

William H. Emory, a prominent mapmaker and U.S. Army officer, played a vital role in shaping the borders of the United States through his expeditions and surveys, especially along the U.S.-Mexico border. He defied offers from the Confederacy and fought for the Union in the Civil War, leaving a lasting impact on U.S. political history and contemporary lives.