In which year first submarine was built?

Dutch inventor Cornelis Drebbel built several submersible boats in 1620. They looked like two wooden rowboats fastened on top of each other, the top one upside down, and covered with a waterproof skin of leather. Propelled by oars extended through watertight openings in the skin, historians consider them to be the first maneuverable submarines. American submarines were used during the Revolutionary War (1775-1783) and the American Civil War (1861-1865).