What successful northern naval victory stongly proved the value of sea power?
successful northern naval victory = when? where?
http://www.infoplease.com/ce6/history/A0857368.html
I vote for the battle for New Orleans because it was early in the war and established the ability of the north to cut off an important economic and social asset to the Confederacy by sea power alone.
The successful northern naval victory that strongly proved the value of sea power is the Battle of Hampton Roads during the American Civil War. This battle took place on March 8 and 9, 1862, between two ironclad warships: the USS Monitor of the Union Navy and the CSS Virginia (formerly known as the USS Merrimack) of the Confederate States Navy.
To find the answer to this question, you would need some knowledge of naval history and key battles during the American Civil War. One way to find this information is by conducting an online search using terms like "naval battles in the Civil War" or "impact of sea power in the Civil War." You can then read through the search results to find specific battles that are mentioned as significant examples of sea power's value.