Half-crossing is an excellent chance to win. When the army was halfway through, its defensive and offensive capabilities weakened. Faced with the situation that the two armies are facing each other across the water, the normal thinking should be to find a way to lead the other side to cross the river first, and then seize the opportunity to fight halfway.
During the Chu-Han period, Han took the initiative to cross the river with Han Xin in the battle of Weihe River, which led the Chu army to attack halfway, and then pretended to attack each other, losing ground. When the Chu army crossed the river in pursuit, the Han army dismantled the sandbags that blocked the upstream water flow, diverted water to fill the enemy and defeated the Chu army. The victory of the Han army in the battle of Weishui was due to the successful use of the half-crossing attack tactics. The battle of Weishui is very important, and this stop turned the situation of Chu and Han. After the defeat, the Chu army lost the initiative in the war and had to defend passively, while the Han army was able to counterattack.
According to records, there were 200,000 people in Chu Jun and100,000 people in the Han army when the two armies confronted each other in the battle of Weishui. It can be seen that the half-crossing attack is a tactic that can win more with less and turn defeat into victory.
However, as one of the five tyrants in the Spring and Autumn Period, Song Xianggong gave up halfway in the flood war. When he became the monarch of the Song Dynasty, the Central Plains was divided into two camps, one was the alliance of big countries such as Chu, Qi, Zheng, Chen and Cai, and the other was the alliance of small countries such as Song, Wei, Zhu, Cao and Slippery.
Song Xianggong wanted to weaken the power of great powers by attacking Zheng, so Chu sent troops to save Zheng and had to withdraw from Zheng to meet Chu. Chu soldiers arrived at the south bank of Hongshui, ready to cross the river voluntarily. Chu Bing is strong, Song Bing is weak. Sima Gu of Song Xianggong proposed to cross the river halfway, but Song Xianggong thought it was not a gentleman's move to take advantage of people's danger, so he asked Chu Bing to cross the river. ChuBing array, SiMaGuHe, he said, the other party is not ready, now there is an opportunity to attack, Song Xianggong thought to wait for the other party array drums to attack. After getting ready for battle, Chu Bing defeated Song Bing, and Song Xianggong was seriously injured in this battle and died soon.
Similarly, the enemy is strong and we are weak, and the two armies face each other across the sea. The battle between Wei River and flood resulted in different results. In the war, it is very important to grasp tactics, make good use of time, place and people, and take the initiative. Grasping the initiative is obviously a good tactic. Song Xianggong claimed to be a teacher of righteousness, and it was foolish to give victory to the enemy militarily.
There are always strong and weak wars. If we waste the opportunity to attack while knowing that our army is in a weak position, it is actually stupid, because the success or failure of a battle has a great influence on the subsequent situation, probably because it is a crucial turning point, so every military order can't miss the opportunity. According to Song Xianggong's morality, if we want to talk about righteousness, the best way is not to fight, but to fight one-on-one, but this is obviously impossible.