During the Interregnum, the rank of admiral was replaced by that of general at sea. In the 18th century, the original nine ranks began to be filled by more than one man per rank, although the rank of admiral of the red was always filled by only one man and was known as Admiral of the Fleet. After the Battle of Trafalgar in 1805 the rank of admiral of the red was introduced. The number of officers holding each rank steadily increased throughout the 18th and early 19th centuries. In 1769 there were 29 admirals of various grades; by the close of the Napoleonic Wars in 1816 there were 190 admirals in service. Thereafter the number of admirals was reduced and in 1853 there were 79 admirals.