Final answer:
The French navy had control over the York River during the American Revolution after defeating the British, which significantly aided the American cause by blockading the river and preventing British resupply.
Step-by-step explanation:
The nation that had their own fleet of ships in the York River was France. During the American Revolution, the French and British fleets met and engaged in a pivotal naval encounter. The British fleet suffered a defeat which resulted in the French taking control of the Chesapeake Bay area and effectively blockading the York River. This was a critical moment in the war as it blocked British supplies and reinforcements, contributing greatly to the eventual surrender of British General Cornwallis at the Siege of Yorktown. This victory by the French fleet was instrumental in the success of the American Revolution.
In reference to the additional provided context, the United States Navy also demonstrated success, particularly during the War of 1812, against the vastly superior British Navy. The American frigates, noted for their unique design which emphasized strength of the hull and greater speed, performed remarkably well despite being significantly outnumbered by the British force.