[Explanation]: Long drive: Riding a horse without stopping; Straight in: Keep going. Refers to a fast march over long distances without stopping. Describe the march as rapid and unstoppable.

【Idiom Story】:

The idiom "long drive" is used to indicate that the army is advancing with an unstoppable force, deep into the heart of the enemy.

This idiom comes from Cao Cao's "Lao Xu Huang Order", I have used soldiers for more than 30 years, and I have heard that the ancient good use of soldiers has not been driven into the enemy's encirclement.

In 219 AD, Cao Cao fought with Liu Bei in this area in order to seize the strategic location of Jingzhou. Liu Bei's general, Guan Yu, surrounded Xiangyang with heavy troops, and Cao Cao's cousin Cao Ren held on to Fancheng, which was adjacent to Xiangyang, and was in a rather difficult situation.

In July of that year, Cao Cao sent General Huwei Yu Ban to lead an army to reinforce Cao Ren. Soon, heavy rain fell in this area of Fancheng, and the Han River flooded. Guan Yu took the opportunity to divert water to flood Cao's army, but Yu Ban's entire army was annihilated and forced to surrender.

Cao Ren was in critical condition as the flood washed into Fancheng. Some of the generals advised him to abandon Fancheng and retreat by boat. But some people strongly objected, saying that the water could not always be so strong, and that it would recede after a while, so it was better to hold on. Cao Ren felt justified and decided to hold on to Fancheng.

Soon, Cao Cao sent the general Xu Huang to lead the army to Fancheng to relieve the siege. Xu Huang was scheming, did not drive his troops directly to Fancheng for the time being, but stationed them a little farther away, and then sent someone to shoot the letter into Fancheng with a dark arrow to get in touch with Cao Ren. It happened that Cao Cao was still organizing reinforcements from other soldiers and horses, and when he learned that Xu Huang's action was very agreeable, he asked him to wait for all the soldiers and horses to arrive and drive to Fancheng together.

At that time, part of Liu Bei's army was stationed in Yancheng, which was not too far from Fancheng. Xu Huang led some troops to the outskirts of Yancheng and deliberately dug a trap, as if to cut off the retreat of the Yancheng army. The garrison planned to evacuate Yancheng in a hurry. So Xu Huang easily obtained this city.

At this time, the 12th Route of soldiers and horses organized by Cao Cao had already arrived. So Xu Huang and these soldiers and horses joined up, planning to attack Guan Yu with Cao Ren inside and outside.

Guan Yu stationed troops in two places, Weitou and Sizuka. Xu Huang pretended to attack Weitou on the surface, but in fact he personally led the army to attack the four mounds. By the time Guan Yu discovered the direction of Xu Huang's main attack, it was too late. The 5,000 soldiers and horses who hurried to the four mounds were quickly defeated by Xu Huang. Then Xu Huang led his subordinates and rushed into Guan Yu's encirclement of Cao Ren. Guan Yu's soldiers were defeated and left, and Xiangyang and Fancheng were finally relieved.

Xu Huang's good news reached Cao Cao, who immediately wrote a condolence order and sent someone to the front. The order reads: "I have been a soldier for more than 30 years, and I know that there is no one who was good at using soldiers in ancient times who could ride his horse as fast as you did for a long distance without stopping, and rushed forward into the encirclement of the enemy. ”