The nominal Commander-in-Chief of the Italian Royal Army was His Majesty King Vittorio Emanuele III. As Commander-in-Chief of all Italian armed forces, Vittorio Emanuele also commanded the Royal Air Force (Regia Aeronautica) and the Royal Navy (Regia Marina). However, in reality, most of the King's military responsibilities were assumed by the Italian Prime Minister Benito Mussolini.[2]