Valley of the Lions (1961)

The evil dictator Ajak sends his armies to attack a neighboring kingdom, and during the battle, the besieged King Annurius orders one of his subjects to take his son Ursus to a place of safety outside of the city, after first putting a royal medallion around the baby's neck. Ajak kills the king and usurps his throne, but the infant prince is smuggled out of the city to safety.