Most don't think about the Navy participating in the battle of Vicksburg but they did have a significant part. Prior to the Union Army's attack on Vicksburg, Union Navy ironclads launched an attack on Confederate forces and the unfortunate civilian inhabitants of Vicksburg in an effort to open up passage along the Mississippi River. The USS Cairo was one of the participants in the attack. Pulled from the bottom of an old Mississippi river channel, this ironclad Yankee river based gun boat has been remarkably restored and placed under a protective tent for generations to come visit. Adjacent the actual boat remains, is an indoor museum/gift shop which has relics from the battle and some history behind the ironclad riverboats of the civil war. I would recommend this as an important stop within the Vicksburg Battlefield site.