Captain General has been the highest rank in the Spanish Army since the 18th century. A five-star rank with NATO code OF-10, it is equivalent to a field marshal of the armies of numerous countries, a general of the Army of the United States, a captain general of the Spanish Navy (Armada Española) or a Captain general of the Air Force in the Spanish Air and Space Force (Ejército del Aire y del Espacio). A Captain General's insignia consists of two command sticks under five four-pointed stars below the Royal Crown.

José Rebolledo de Palafox y Melzi, 1st Duke of Zaragoza was a Spanish general who fought in the Peninsular War.