But it should be noted that no matter what kind of psychological counseling before the war, out of fear of death and battlefield instinct, soldiers who go to the battlefield for the first time will be psychologically nervous, which will lead to desertion. Desertion is the most taboo for armies of all countries, because desertion will seriously affect the morale of troops. Therefore, when armies of various countries fight, there will always be overseers behind them, but this will not be mentioned in actual propaganda. After going to the battlefield once, the soldiers' mentality will be greatly changed, and the subsequent operations will be much easier, which is why all countries attach great importance to the first battle. The victory or defeat of the first battle has a great influence on morale and soldiers' mentality!