Although the title only speaks of battle arrays, the Zhenji also covers a lot of themes related to military formations and the preparation for war. Recruitment, assembling the units, exercise, reward and punishment, formations on the battlefield, orders and commands are dealt with, as well as aspects of how to wage battle with cavalry, infantry, with chariots, in different territories and at night and in bad weather. The topics of the book give a good overview of the traditional armies and their fighting techniques. Concretely analyzed, it can also be seen what the weaknesses of the Ming period armies were, and why they failed against rebel armies and the Manchus.
The troops obtained training for the five senses (eyes, ears, feet, hands, and heart) which then mutually supported each other. In the army it was also possible that different units could take over such tasks for the whole corps, like skilled units (jidui 技隊), brave units (danqi dui 膽氣隊), or units displaying defiance of death (gansi dui 敢死隊). During battle it was important that the troops used advantageous moments, in which the own strengths could be exhibited, before advancing with great flexibility and without offering the enemy a chance to attack. It was always important to move first and to attack the enemy before he had made his lines impenetrable. The enemy had to be blocked from retreat, a strong enemy had to be divided, a disturbed enemy had to be unsettled, a weak enemy must attacked directly, a hesitating enemy had to be coerced, a stable enemy had to be deprived of his foothold, and a dispersed enemy must be assailed. When retreating, the enemy must be left unclear about one's position, and when advancing the enemy must not known where one planned ot attack.
The Zhenji also provides information about the use of weapons, the arrangement of battle arrays and the movement of troops on the battleground and in different territories.