Second-in-command

The Prince of Orange served as second-in-command of the Allied army under Arthur Wellesley, Duke of Wellington. (PROSE: World Game)

During the Last Great Time War, the Dalek Time Strategist had the coveted rank of second-in-command of the Dalek Empire, serving as an advisor to the Dalek Emperor. (AUDIO: Restoration of the Daleks, Temmosus)

Following the establishment of the Parliament of the Daleks, the original Supreme Dalek of the New Dalek Paradigm served as second-in-command to the Prime Minister of the Daleks, (TV: Asylum of the Daleks, PROSE: The Secret Lives of Monsters) who superseded the position of Dalek Emperor. (PROSE: Dalek Combat Training Manual) This form of the Dalek hierarchy stood for centuries until the Supreme, during the Siege of Trenzalore, exterminated the Prime Minister and took command of the Parliament before they were themselves wiped out by the Eleventh Doctor's regeneration. (PROSE: Dalek: The Astounding Untold History of the Greatest Enemies of the Universe)