Camp Lawton or the Millen Prison was a stockade which held Union soldiers who been taken as prisoners-of-war during the American Civil War. Located beside the Augusta and Savannah Railroad right-of-way five miles north of what was then Millen Junction in Burke County, the new prison facility was modeled after Camp Sumter. It opened in October 1864 but had to be evacuated within six weeks, due to the advance of Sherman's army through Georgia. With an area of 42 acres (17 ha) and holding over 10,000 of a planned 40,000 men, it was said to be the largest prison in the world at that time.