First, being a teacher for the army, a strategist, as the name implies, is definitely related to the army. According to the records of ancient history books, the first duty of a strategist is to be in charge of the affairs of the army and be responsible for supervising the army. This is the first duty of a strategist, and the second is his role as a teacher to advise the Lord. In many TV dramas, the image of military advisers is portrayed by some older actors, and the older military advisers are basically assisting the young monarch. This collocation is also very common.
Second, military advisers with a long history did not appear in the Wei and Jin Dynasties of the Three Kingdoms, but as early as the Warring States period. In Historical Records, there is the earliest record of the responsibilities of military advisers, but in Historical Records, military advisers do have the title of the monarch's teacher. During the Three Kingdoms period, the classification of military advisers was very detailed, especially during the Wei and Jin Dynasties. Military advisers could be divided into many categories, and each category had different powers and positions.
Third, the definition is different. In fact, every regime has many different definitions of the responsibility of military advisers. During the Wei and Jin Dynasties, the most important duty of the military adviser in Cao and Wei camps was to offer advice and suggestions to the master, and at the same time, he was in charge of the power of election and punishment, which was equivalent to holding the current decision-making power and judicial power, so the military adviser in Wei and Jin Dynasties was a role that could not be ignored. In Shu Han, as a strategist of Shu Han, Zhuge Liang's most important role is to supervise and urge some generals to prevent him from defecting to the enemy and treason.