 Complete the following phrase:  Early in the American Civil War 18611865, the important Gosport Shipyard upstream from Craney Island on the Elizabeth River at Portsmouth fell into Confederate hands and the first Confederate ironclad warship CSS Virginia was converted from USS Merrimack there. The Confederates built a 20-gun battery on the island and berthed the Virginia there. This ship fought the first Union ironclad USS Monitor during the famous 