ドン・カルロス・ビューエル
In May 1862, Morton was assigned to the Army of the Ohio as chief engineer under General Don Carlos Buell. He immediately began construction of fortifications around Nashville, Tennessee and was ordered to stay and complete construction while the Army of the Ohio marched to Kentucky. The construction of these defenses, named Fort Negley, would take three months to complete and would become the largest inland masonry fort of the time.