Several replicas of ten-pound Parrott guns are located in this area. The Parrott was a muzzle-loaded rifled cannon, made in models firing projectiles from ten to two hundred fifty pounds, with a maximum effective range of about twenty-five hundred yards. It can be recognized by the heavy wrought-iron band around the breech and had greater accuracy and effectiveness than the more commonly used smooth-bore Napoleon. Although many styles and types of guns were used in the Civil War, ninety percent of battle firing came from ten types: six- and twelve-pound guns; twelve-, twenty-four-, and thirty-two-pound howitzers; twelve-pound mountain howitzers; twelve-pound Napoleons; ten- and twenty-pound Parrotts; and three-inch ordnance. From this point, well-preserved original Confederate earthwork fortifications can be seen to the right and left, once part of a continuous defensive line stretching sixty-five miles around Richmond, the Confederate capital. On the east side, when there is sufficient rainfall, the moat may be seen filled with water. Such a trench was usually dug on the side expected to receive attack, and the earth from the moat was piled up to form the earthwork itself. These lines were started before the Battle of Seven Pines on thirty-one May eighteen sixty-two and were continually strengthened throughout the war. This semi-circle is a typical artillery position of four guns.