Fort Curtis - Credit: Wikimedia Commons
Fort Curtis was a defensive position used by the Union Army to defend Helena, Arkansas, during the American Civil War. Built in 1862 after the Union occupation of the city, it only saw combat once, in the Battle of Helena on July 4, 1863. Military use of the site ended in 1866, and the fort was destroyed in 1874. The Sidney H. Horner House now occupies a portion of the original site. A reconstruction, known as New Fort Curtis, was opened in 2012. There is some uncertainty about both the exact armament and size of the original fort. Read more on Wikipedia
Source: en.wikipedia.org