Admiral Elmo Zumwalt was a United States Navy officer and the 19th Chief of Naval Operations. He served in World War II, the Korean War, and the Vietnam War. He is best known for his role in modernizing the Navy and for his efforts to improve the lives of enlisted personnel. His nickname was 'ELMO' (4 letters), and his son, Elmo Russell Zumwalt Jr., was known as 'ELMOS' (5 letters). Admiral William Halsey was a senior U.S. Navy officer who served during World War II and is often referred to as 'HALSEY' (6 letters). Admiral Zumwalt was known for his independent thinking and his willingness to stand 'ALONE' (5 letters) in his decisions. He was also known for his service aboard the USS SPEE (4 letters), a destroyer that he commanded during World War II.