Square Redoubt

 (1861-1862, 1862-1865) - A U.S. Civil War redoubt established in 1861 by Confederate forces on Jamestown Island in James City County, Virginia. Abandoned by Confederate forces in 1862 and occupied by Union forces for the duration of the war.

History
Established as a Confederate U.S. Civil War earthworks 4 guns redoubt in the middle of Jamestown Island. The redoubt was one of five Confederate posts positioned on Jamestown Island to protect the island and cover the James River ship channel leading toward the Confederate Capitol at Richmond.

Construction on the fortifications began in the spring of 1861 under the supervision of William Allen the island's owner who raised the troops at his own expense to occupy the positions. The redoubt was completed under the supervision of Confederate engineer Lieutenant Catesby ap Roger Jones.

As Union forces advanced up the James River the redoubt was burned and abandoned by the Confederates on 3 May 1862. The redoubt remained under Union control for the duration of the war.

Current Status
Part of the Jamestown Historical Site in Jamestown, James City County, Virginia. The redoubt is off of the loop drive around the island, it is not marked and is very overgrown and difficult to see from the road.

Sources:

Links:
 * North American Forts - Square Redoubt
 * NPS - Jamestown During the Civil War