Fort Southerland

Fort Southerland, also known as Redoubt E and Fort Diamond, is a redoubt built during the American Civil War to protect Camden, Arkansas, United States. Confederate forces, assisted by slave labor, built it along with four other redoubts in early 1864 after a Union victory in the Little Rock campaign the previous year. A roughly oval irregular octagon in plan, it mounted three cannon. When Union forces captured Camden in April 1864 during the Camden Expedition, they improved the defenses of the five redoubts, which were not sufficient for proper defense of the city. After the Confederates retook Camden later that month, they continued to improve the city's defenses.

The fort lies within Fort Southerland Park, a municipal park dedicated in 1974. It was listed on the National Register of Historic Places in 1994, and is part of the Camden Expedition Sites National Historic Landmark. Along with Fort Lookout (Redoubt A), it is one of only two redoubts around Camden still in existence.