In July 1866 he became the U.S. Navy's first full admiral
Admiral 
ranks above vice admiral and below fleet admiral in the Navy; the ... Congress 
finally authorized nine rear admirals on July 16, 1862, although... [DOC] [TLE] John Hubbard (admiral) - Wikipedia [PAR] Rear Admiral John Hubbard (19 May 1849  30 May 1932) was an officer in the 
United States Navy.