Darigan
The Darigan, was a special military force within the armed forces of the Sasanian Empire. This force was charged with the protection of the Sasanian Emperor. The members of the Darigan were chosen from the various noble and significant families within the empire. Members of the Darigan were charged with tasks such as guarding the gates of the palace, presenting guests and foreign leaders to the ruler, and occasionally acted as military advisors or diplomats to the King.