Isaiah Mackenzie Naval Academy was the officer school of the Grayson Space Navy. When the Protectorate of Grayson joined the Manticoran Alliance in 1903 PD, an agreement was reached to send Grayson cadets to the Saganami Island Academy on Manticore until the Protectorate's curriculum was brought up to speed with modern standards. (SI1) By 1920 PD, the Mackenzie Acedemy reopened with a modernized curriculum and up-to-date training facilities. It was overseen by Doctrine and Training Command. (Companion)