The objective of the research project is to examine how the Union and Confederate naval strategies and new naval technologies affected the conduct of the American Civil War. With regard to the Union Navy's strategy, the effectiveness of the blockade, Western River Campaign, and amphibious operations were examined. Discussions on the Union blockade also touch on the effectiveness on Confederate blockade runners. The Confederate strategies of using privateers and commerce raiders are examined. Confederate coastal and river defenses are examined within the context of new technology, specifically with respect to ironclad ships and the use of mines, torpedoes, and submarines. The paper shows how naval strategy did play a major role in the outcome of the Civil War. Although it cannot be said that naval strategies were singularly decisive, they certainly were vitally important and often overlooked in history books.