John Jervis St Vincent was a British naval officer who served during the late 18th and early 19th centuries. He was known for his strategic brilliance and leadership in the Royal Navy, particularly during the French Revolutionary and Napoleonic Wars. St Vincent was appointed as the First Lord of the Admiralty and played a key role in modernizing the British Navy. He was also made an Earl and Viscount for his contributions to the naval forces. St Vincent's legacy is marked by his significant impact on naval tactics and his efforts to improve the efficiency and effectiveness of the Royal Navy.