First: use the military flag.
In fact, in ancient times, due to the large number of people, not all soldiers could see it if they just shouted with their voices. So at this time, it is necessary to use a sign for all soldiers to see. There were many chess players under the ancient generals. There were towers in the barracks, and a chess player was arranged on the towers. If you encounter any problems or the general has any orders, use the military flag to issue them.
Different flags and actions represent different orders, and each barracks will have its own way of issuing orders, so even if the enemy sees the flag waved by the barracks, he may not know what the other side means. Therefore, every military camp will have its own pre-agreed flag-waving method, which means that every general has his own secret code, and different generals or different military camps are different.
Therefore, in daily training, soldiers will be given special training on flag command, so that soldiers can understand the general's command. Different barracks have different habits and ways.
Second: Use drums.
In ancient times, fighting was actually very troublesome. You not only have to carry a lot of military flags, but also prepare to beat drums. When fighting, there will be special people beating gongs and drums to boost the morale of their soldiers and give orders to them. Because in the war, because their soldiers are mixed with the soldiers of the other side, the soldiers have no energy to pay attention to the change of the flag at this time.
On the contrary, it will be more sensitive to the change of sound, so at this time, the general will issue an order to let the drummer issue an order by changing the rhythm and drum rules. We often mention a word called "retreat from the golden bell", which actually means issuing orders through the sound of beating gongs and drums.
Third: arrange tactics before the war.
Because it is difficult to communicate during the war, some generals will arrange all the tactics before the war, so soldiers only need to strictly follow the pre-arranged tactics during the war.