Captain Hotchkiss served under Jackson for the rest of the general's life. Producing large volumes of accurate, detailed, and even beautiful maps, he also aided the general by personally directing troop movements across the terrain with which he had become so familiar. Jackson's reputation for lightning movements and surprise attacks, befuddling his enemies, owes much to Hotchkiss's cartography. Together they served in the Valley Campaign, the Northern Virginia Campaign (including Cedar Mountain, the Second Battle of Bull Run, and Chantilly), the Maryland Campaign (including Harpers Ferry and Antietam), and the Battle of Fredericksburg. At the Battle of Chancellorsville in May 1863, Jackson asked Hotchkiss for eight maps of the area west of Fredericksburg and, along with local residents, discovered the route that Jackson's corps took in the famous flanking march against the Union army. That night, Jackson was mortally wounded and died less than two weeks later.