 Complete the following phrase:  The establishment of the Continental Works coincided with the outbreak of the American Civil War in April 1861, and later that year, Rowland became associated with New York engineer John Ericsson, who had just secured a contract with the United States Navy for the construction of a radically new type of ironclad warship with low freeboard and a revolving gun turret. Ericsson subcontracted Rowland for construction of the hull, and the new warship, known as , was launched at the Continental Works in just 101 days. When Monitor successfully neutralized the threat from the Confederate ironclad CSS Virginia at the 