This is the Imperial Military Staff and the Imperial Military Headquarters.
As the highest command institution of the Imperial Army, it's responsible for formulating major strategic guidelines, allocating and coordinating various types of operations.
The position of Chief of Staff is held by Hesintos of the Diamond Throne, a Cerryti Empire Marshal, who is directly accountable to Emperor Baldo Hoffman Temple.
He oversees military affairs of the Imperial Army, forms Imperial troops, and establishes battle plans.
It has several army groups under its command, including the headquarters of the Imperial Land Forces, the Imperial Air Forces, the Imperial Navy, the Imperial Weapons and Equipment Department, the General Mobilization Department, and the War Propaganda Department.