When Qin Shihuang saw this urgent report, he quickly sent General Yuan Mu to resist it. Yuan Mu led the army to defeat the Huns. After defeating Xiongnu, Yuan Mu began to think hard about how to transmit military information quickly. One day, it was raining in Mao Mao, and Yuan Mu looked into the distance from the battlements. Suddenly, he saw a distant village cooking and plumes of smoke rising. It's raining and the smoke is rising. He had a brainwave. Then Yuan Mu built a beacon tower on the Great Wall, in which dry wood and kindling materials were prepared. Fire whenever there is a war. Since the beacon tower was built, it has become more magnificent. How dare those conference semifinals make a move again? So since then, the border has stopped. 2. During the Three Kingdoms period, Guan Yu set up a beacon tower along the Yangtze River, imitating the old system of Zhou beacon tower. Once Wu Dong's army was found, it lit a bonfire to warn the clouds. If Guan gets a reward, return to the army quickly.
Monroe of Soochow crossed the river in white, which puzzled the Shu army. Shu soldiers guarding beacon towers have become commonplace, and they often accept bribes from animal dealers. Therefore, although a large number of people in white crossed the river, it did not arouse the vigilance of Shu soldiers at all. Wu Dong just used the trick of cheating, so that Guan Yu could not get Jingzhou's military information from the beacon tower in time, and was killed. 3. In the Ming Dynasty, the Zhejiang Army recruited by Qi Jiguang in Zhejiang, although only 3,000 people, was called "Qijiajun" and was stationed in Ningbo. Ninghai was the key attack area of the Japanese army at that time. One night, the Japanese army raided Ninghai County, and the bonfire immediately called the police. At this time, Qi Jiajun, who is more than 80 kilometers away from Ninghai, received an alarm in a very short time. After receiving the police, Qi Jiguang immediately led the whole army to Ninghai, and finally arrived in Ninghai the next morning after a night's forced March. The enemy was surprised to see the sudden arrival of Qigujun. Has retreated to the coast, ready to seize the ship and flee. Qigujun followed suit and wiped out the enemy in Tao Zhu, Xinhe, Zhai and other places, winning a great victory. This is the first battle fought by Qi Jiajun since the formation of the army, and it won a great victory. After this war, the Japanese invaders who had harmed Ninghai for more than 200 years began to calm down.