In the end, Yang Rui chose to dispatch more ethereal secret ninja soldiers to Cao Cao's radiation range areas where the roads that may return to Luoyang Imperial City, and also sent flying pets to track and explore to cooperate with the movements of Cao Cao's troops.

With the entire Yuan Shao League troops retreating, the area and flexibility that can be explored by flying pets is much stronger than the Ethereal Secret Ninja.

In contrast, although the Ethereal Secret Ninja information transmission channel is more smooth and can almost match the seamless links of real communication, the premise is that the monitoring area must be pre-arranged.

When every ethereal secret ninja soldier is set up, in terms of real communication, it is equivalent to setting up one signal tower after another, but the area without a "signal tower" is completely a communication blind spot.

While Yang Rui strengthened the acquisition of information and continued to pursue, he did not arrange his troops exactly as Guo Jia said. After all, the various arrangements Guo Jia mentioned were based on inference, and were not inferences under sufficient conditions.

Yang Rui did not act rashly, but waved the army to chase Cao Cao and the fleeing troops and refused to give up. Guo Jia also helped him with all his strength along the way, and did not have any other emotions because Yang Rui did not accept his advice.

With Guo Jia's assistance, Yang Rui's troops broke through several ambushes arranged by Cao Cao along the way, and chased Cao Cao's main force closer and closer, almost without a way to heaven and no way to the ground.

The main force of Cao Cao's escaped troops marched towards the northwest direction, with almost no more and less directions in the middle. He went straight to the Taihang Mountains through some Hebei.

This reminded Yang Rui of Chu Feiyan and Zhang Niujiao who had been active in the Taihang Mountains, and the Black Mountain Army that broke out during the Yellow Turban Uprising. Yang Rui also beat the Black Mountain Army, especially the more distinctive special military service, the Black Mountain Infantry Upgrade Skill Book.

Later, with the outbreak of the Dong Zhuo Rebellion, the Black Mountain Army also joined Dong Zhuo's camp and opened up a second battlefield in the plot of heroes' confrontation with Dong, that is, the East Road battlefield, providing conditions for the majority of players to organize groups, small groups and scattered players to watch the plot.

In the entire Dong Zhuo Rebellion plot, most of the players' group are most exposed to the special group of the Black Mountain Army. They have also obtained the experience value, money, and various props and materials needed for medium-term development from the Black Mountain Army. They always talk about it with relish.

Later, the plot of Dong Zhuo's rebellion ended, and the situation in the entire Eastern Han Dynasty changed tremendously. When Lu Bu entered Hanoi County, he joined forces with Yuan Shao to defeat the Heishan Army. The Fourth Battalion massacred many small forces around, and the Heishan Army still had remnants in the Taihang Mountains.

This activity has been maintained until now, which means that Cao Cao fled to the direction of the Taihang Mountains at this time, and in fact, there are still remnants of the Black Mountain Army active there.

Of course, the strength of the Black Mountain Army was no longer the same as the original one. Moreover, after being defeated by Lu Bu and Yuan Shao, some sequences were also incorporated in large numbers. At this time, the remaining one was not enough to threaten Cao Cao, even if Cao Cao was surrounded by the defeated remnants.

At the same time, after reading through the main body of the Taihang Mountains, there are the hinterland of Bingzhou, Taiyuan, Shangdang, Jianxing, Xihe, Yanmen, Leping, Xinxing and other Bingzhou counties, which will all appear in front of you. Yang Rui even believes that this is also a place where Cao Cao may settle for when he is desperate.

The actual situation is that the Bingzhou area in the game is desolate, and it is often invaded and disturbed by foreign races from time to time, so that the population in the already very deserted area is even smaller, so it is not a qualified place to settle down.

The most important thing is the invasion of foreign races. This point of washing and plundering cannot be improved for a long time, so that the power in Bingzhou is not growing very strong.

Among them, Lu Bu is an alien, and his subordinates, Bingzhou Iron Cavalry, also inherited the strong folk customs of the region, which gave him the sharp combat power and fearlessness on the battlefield.

Under the current conditions, what is slightly better is that after several missions, Yang Rui had almost captured all the foreign tribes such as the Xianbei and Wuhuan in the surrounding areas, and many of the Xiongnu tribes were wiped out by Yang Rui, and the core camps were seized accounted for almost half. The Southern Xiongnus south of the desert had almost been completely cleaned up.

Under such circumstances, Cao Cao had another choice when he was desperate. With the Taihang Mountains as a barrier and not invaded by foreign tribes, several counties such as Taiyuan, Shangdang, Jianxing, Xihe, Yanmen, Leping, and Xinxing could occupy it and make a small turnaround place.

However, in that case, the speed of Cao Cao's development of power can be imagined. The population base of the Bingzhou area is far from that of Sili Prefecture after immigration, and its development potential can be imagined.

It is worth mentioning here that there are not many indigenous people in Qingzhou. However, after Yang Rui took over, the population of Qingzhou almost doubled. By this time, Qingzhou's population was already among more than a dozen states in the Han Dynasty.

The same is true for Yanzhou and Xuzhou. These two states are originally one of the most densely populated areas. After Yang Rui took control, a series of measures and systems have begun to be implemented, so the population density has been rising sharply, and it has now become the region with the largest population density in the Three Kingdoms civilized region.

Putting aside these topics, from the Yuan Shao Allied Army, Yang Rui, Guo Jia, Yu Jin and others pursued Cao Cao and fled, fighting and fighting. On the way, Cao Cao set up many traps and ambush for Yang Rui's troops.

However, these methods of Cao Cao did not work too much. After paying a small price, Yang Rui's troops gradually approached the defeated army where Cao Cao was located in one by one.

Even the flying pet units in the sky have found Cao Cao, which is less than 1,000 miles away from Yang Rui's Pioneer Cavalry Department.

Such a number looks huge, but it is actually a very small distance above the map that is 100 times enlarged in the game. Especially for cavalry, you can get there with just two whips.

"Get! Get! Get"

"Xilulu"

"Don't leave ahead, why not stop and say a few words?"

Accompanied by a rapid sound of horse hooves and the neighing of war horses, Yang Rui, along with Guo Jia and Yu Jin, commanded the cavalry department and watched as they chased Cao Cao in front of them.
Chapter completed!