Since the beginning of the development of human civilization, war as a means of violence for the sake of interests, it was born, the long history of war, the two sides of the war have also maintained a certain tacit understanding with each other, and formed some rules, such as the simplest "two countries do not cut each other to make a deal", in the war, can not hurt the other side's message in any way.
As for this rule, in fact, it began as early as the Spring and Autumn Warring States thousands of years ago.
In 596 BC, the State of Chu sent an envoy Shen Zhou to the State of Qi, because of the friction of the land, the State of Chu and the neighboring Song have always had contradictions, so the King of Chu Zhuang specifically told him at the ceremony of bidding farewell to Shen Zhou not to go to the State of Song. Unexpectedly, this sentence was leaked out by the palace people and reached the ears of Hua Yuan, the consul of the Song Kingdom, and he was not happy at this time, chu Guo This is a small belly chicken intestine! Then don't blame me for being a villain! Therefore, he specially sent people to the main traffic road through Shenzhou to set up an ambush, killed the envoys of the Chu state, and some people fled back to the Chu state, and the king of Chu Zhuang heard the news, and he was so angry that he trembled, and the "Zuo Biography" recorded that he "surrendered and rose up", and immediately sent a large army to besiege the capital of the Song state for 9 months.
For this reason, the Song state had to send Hua Yuan to the Chu military camp and bow to the king of Chu Zhuang to admit his mistake, because the Chu army had been besieging the city for several days, the grain and grass were almost finished, and decided to take advantage of the good, the two countries immediately agreed to protect the envoys of both sides, and Hua Yuan came to live in the Chu state as a hostage of the peace talks, which was also the first agreement on paper not to cut the agreement.
In modern times, the Geneva Conventions of the world have also clearly stipulated that the countries of the world must not abuse prisoners, cannot shoot medical soldiers, elderly people and children and other incapacitated personnel, and cannot kill negotiators on both sides, which is a better description of this sentence.
In fact, doing this is a good thing for both sides, leaving a back road between each other, but in ancient times, some people did not play cards according to the routine, and what would happen if they cut it? In the Han Dynasty, there was a general who tried, and he was Geng Gong, the great general of the Han Dynasty Jianwei. Geng Gong's life is very legendary, his father Geng Guang died very early, Geng Gong became an orphan at a young age, but he liked to learn martial arts and read military books from an early age, was generous and strategic, and had the talent of a general, so in 74 AD, the capital Liu Zhang sent an army to attack Cheshi, and then Geng Gong, who was a soldier, was appointed Sima (司馬). During his tenure as a general at Border Pass, he repeatedly repelled the invading Huns and was therefore worshipped as a general.
In the eighteenth year of Yongping, the Hanping Emperor died, so cheshi and the Xiongnu took the opportunity to rebel, the Xiongnu army besieged Geng Gong and hundreds of soldiers in the isolated city, a few months later, the Han army ran out of food, but Geng Gong personally encouraged the soldiers to cheer up, sleep with them, and boiled armor and crossbows, eating the leather animal tendons on it, the Han army repelled the Wave after wave of attacks by the Xiongnu, and there were only a few dozen people left in the city, which also made the Han army a little shaken, Geng Gong had a plan, when the Northern Xiongnu sent an emissary into the city to persuade him to surrender, Geng Gong actually sent someone to kill the emissary He also roasted the corpse of the Northern Xiongnu emissary at the head of the city, which made Shan Yu completely angry, and sent troops to continue to besiege the city, and the soldiers learned of this news and understood that once they surrendered, the end would definitely be very tragic, so they had to insist harder.
In the end, a few days later, Geng Gong and others finally waited for reinforcements from the Han Dynasty to defend this isolated city, and most importantly, they delayed the xiongnu offensive, Geng Gong beheaded the envoys, but won a strategic victory by virtue of this, which is also a rare scene in the history of war.