Generalissimo

noun

1. The commander in chief of all the armed forces in certain countries.
2. A commander-in-chief; the supreme commander of all the forces of a country, of several armies, or of an army comprising several corps or divisions acting separately.
3. The chief commander of an army; especially, the commander in chief of an army consisting of two or more grand divisions under separate commanders; -- a title used in most foreign countries.
4. A supreme commander of the armed forces of a country, especially one who is also a political leader.
5. the officer who holds the supreme command