Avery J. Johnson Academy of Military Science
From Halopedia, the Halo wiki
The Avery J. Johnson Academy of Military Science (abbreviated AJJ) is a military academy hidden on a frontier world where members of the Spartan Operations train. It is posthumously named after the Insurrection and Human-Covenant War veteran Avery Johnson, a member of the SPARTAN-I program, who was killed in action during the Raid on Installation 08 in late 2552.
As part of the Spartan Training and Qualification Program, the academy has an outdoor training area at the base of mountains. This training area allows for live fire practice. Part of this training area includes Buildings 5, 7, 8 and 9 as well as Tower 187.
The academy was operating and training forces even in the midst of the Created occupation of parts of the galaxy in either late 2559 or early 2560. It is likely run - in some part - by the Spartan Training and Education department.
The Avery J. Johnson Academy of Military Science acts as the setting and framing device for the tutorial and matchmaking practice of the Halo Infinite multiplayer. It is also the setting for the map Live Fire in the game as well.
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