General Rosecrans' move to the south depended on a secure source of provisions, and Murfreesboro was chosen for his supply depot. Soon after the battle, Brigadier General James St. Clair Morton, Chief Engineer of the Army of the Cumberland, was ordered to build Fortress Rosecrans, some northwest of the town. The fortifications covered about and were the largest built during the war. Fortress Rosecrans consisted of eight lunettes, four redoubts, and connecting fortifications. The fortress was built around the Nashville and Chattanooga Railroad and the West Fork of the Stones River; two roads provided additional access and transportation.