The Libby Prison Escape at Richmond, Virginia in February 1864 saw over 100 Union prisoners-of-war escape from captivity. It was one of the most successful prison breaks of the American Civil War.
Led by Colonel Thomas E. Rose of the 77th Pennsylvania Infantry, the prisoners started tunnelling in a rat-infested zone which the Confederate guards were reluctant to enter. The tunnel emerged in a vacant lot beside a warehouse, from where the escapees could walk out through the gate without arousing suspicion. Since the prison was believed to be escape-proof, there was less vigilance by the authorities than in other camps, and the alarm was not raised for nearly twelve hours. Over half the prisoners were able to reach Union lines, helped by their familiarity with the terrain after serving in McClellan's Peninsular Campaign of 1862.
At the outbreak of the Civil War, Luther Libby was running a ship supply shop from the corner of a large warehouse in Richmond, Virginia. In need of a new prison for captured Union officers, Confederate soldiers gave Libby 48 hours to evacuate his property. The sign over the north-west corner reading "L. Libby & Son, Ship Chandlers" was never removed, and consequently the building and prison bore his name. Since the Confederates believed the building inescapable, the staff considered their job relatively easy.
Libby Prison encompassed an entire city block in Richmond. To the north lay Cary Street, connecting the prison area to the rest of the city. On the south side ran the James River. The prison itself stood three stories above ground with a basement exposed on the river side. Confederate soldiers whitewashed the outer walls to make lurking prisoners instantly recognizable.
The first floor of Libby Prison housed the various offices of the Confederate guard unit; the second and third floors were partitioned as inmate holding areas. The basement of the prison was divided into three sections. The western end was a storage cellar, the middle section was a carpenter’s shop used by civilians, and the eastern end was an abandoned kitchen. This kitchen in the eastern section was once used by Union inmates, but an infestation of rats and constant flooding compelled the Confederates to close it off. The abandoned area became known as "Rat Hell."