The Battle of Hampton Roads, often referred to as either the Battle of the Monitor and Merrimack (or Virginia) or the Battle of Ironclads, was the most noted and arguably most important naval battle of the American Civil War from the standpoint of the development of navies. It was fought over two days, March 8–9, 1862, in Hampton Roads, a roadstead in Virginia where the Elizabeth and Nansemond Rivers meet the James River just before it enters Chesapeake Bay adjacent to the city of Norfolk. The battle was a part of the effort of the Confederacy to break the Union blockade, which had cut off Virginia's largest cities, Norfolk and Richmond, from international trade.