Battle of Calabria
A recognized expert in gunnery, Madden helped in the introduction of radar into the Royal Navy. He participated in the Battle of Calabria, the Battle of Taranto, the Battle of Cape Matapan, and the Battle of Crete during the Second World War. Following the war, Madden introduced the General List for officers which abolished many of the distinctions between the executive and other branches within the Royal Navy. He also served as the Chief of Naval Staff of the Royal New Zealand Navy.