WWII. The USN had to provide protection and taxi service in the ETO (European Theater of Operations); but had to fight a Naval War in the PTO (Pacific Theater of Operations).
Another words, USN fleet carriers, fast battleships, Fletcher destroyers, and heavy cruisers had to battle their counterparts in the Pacific; while providing smaller Jeep carriers, old battleships, and old destroyers & cruisers for Atlantic duties during the war. Added all together, WWII was a tough one for the USN. More US Sailors and more US warships were destroyed during WWII than all the US wars put together.
Hardest hit was the US Navy.
My opinion....The Civil War.
The US Navy relied heavily on it's air units to win the war.
goerge washingtonJohn Paul Jones was the comander of the us navy in the revolutionary war
The French
The US Navy .
Josephus Daniels was Secretary of the Navy during World War I.
The US Navy reached it's maximum number of ships in 1945 at the end of World War 2
Twice; once during the US Civil War (1861-1865), and once during the Vietnam War (1965-1970).
Yes, submarines were used by the Confederate Navy in the US Civil War.
During the US Civil War, the US had a much larger navy than the Confederacy. One advantage of this was that it was at a problem for the South when Northern warships blockaded Southern ports.
Because the North Viet Navy attacked the US Navy in the Tonkin Gulf.