The fort's interior was a huge logistical resource center, including sawmills, warehouses, quartermaster maintenance depots, ammunition magazines, and living quarters for the 2,000 men who handled the operations and defended the post. After the fortress was completed in June 1863, Rosecrans ventured to the south. The fortress was never attacked, in part because the Union troops held the town of Murfreesboro hostage by training their artillery on the courthouse. Major portions of the earthworks still exist and have been incorporated into the battlefield historic site.