Washington Roebling is well known as the man who supervised construction of the Brooklyn Bridge. His path to overseeing that monumental task began during the Civil War. In addition to his brave, dramatic actions at Gettysburg, his Civil War service was remarkable: artilleryman, bridge builder, scout, balloonist, mapmaker, engineer, and staff officer. His story reveals much about Gettysburg but also about Civil War intelligence and engineering and the politics and infighting within the Army of the Potomac's high command. Roebling's service--leadership, engineering, decision-making, and managing personalities and politics--prepared him well for overseeing the Brooklyn Bridge.