Andidora tells the story of four men who successfully commanded battlefleets in the 20th century: Japan's Heihachiro Togo, England's John Jellicoe, and America's William Halsey and Raymond Spruance. This study provides personality profiles and detailed accounts of their major battles. Analyzing their command decisions based on what each commander knew or could have reasonably inferred at the time decisions were made, Andidora compares their accomplishments to those of Horatio Nelson, who delivered stunning naval victories for England during the Napoleonic Wars. However, he concludes that the Nelsonian standard is inappropriate in the modern naval environment due to the increased size and technological complexity of modern fleets and the political imperative to preserve costly and strategically significant naval assets.