The Battle of Copenhagen, 2nd April, 1801 - contemporary Danish engraving - courtesy of the Parker Gallery, London.... The naval Battle of Copenhagen was fought on April 2, 1801 by a British fleet under the command of Admiral Sir Hyde Parker, against a Dano-Norwegian fleet anchored just off Copenhagen. The main attack was led by Vice-Admiral Horatio Nelson, who famously disobeyed Parker's order to withdraw and destroyed many of the Dano-Norwegian ships before Denmark-Norway agreed to a truce. 固opFoto