While Sima Yi was expanding his armaments and warfare, he was also paying close attention to the movements of the annexation of prefectures, and intelligence work was also extremely important to Sima Yi; in such places as Guanlong, Jingzhou, and Huainan, Sima Yi had a relatively complete intelligence network; relatively speaking, the intelligence system of the annexation of prefectures was relatively weak, but in the past few years, it has also actively carried out deployment, and has also achieved considerable results in infiltrating the prefectures.

Sima Shi has always been responsible for the intelligence system of the state, and he fed back the collected information to Sima Yi in a timely manner, so that Sima Yi can make a reasonable judgment on the situation in the state.

Now the strategic focus of the Sima army has been shifted to the state, so it is very important for the Sima army to grasp the movement of the state army.

Sima Yi is most concerned about the movement of the cavalry of the Bingzhou Army, this time his large-scale expansion of the cavalry, is to use the Bingzhou cavalry as an imaginary enemy, in Sima Yi's view, as long as he can defeat the Bingzhou cavalry, it is equivalent to breaking a pair of wings of Cao Liang, and the rest are not to worry about.

"Father, according to the latest intelligence, Cao Liang transferred the Xiao Cavalry Battalion, the Yue Cavalry Battalion, and the Tun Cavalry Battalion to the valley, where they practiced and were heavily guarded, and it was difficult for our people to approach and infiltrate them, so they could only listen to the news on the periphery." After Sima Shi got the latest information about the Bingzhou cavalry, he would often report it to Sima Yi as soon as possible.

"Oh, that's right." Sima Yi sighed lightly and fell into deep thought, now the two sides are fighting in the air, fighting wits and strength, Sima Yi has expanded the cavalry on a large scale, and he can't hide it from Cao Liang's ears and eyes, and after Cao Liang gets the news, he will inevitably have targeted strategic arrangements.

But what does it mean to drill into a ravine? Could it be that Cao Liang will have a new tactical arrangement that is not a motive?

However, now the cavalry's fighting style and tactics are already very mature, even if Cao Liang lets the Bingzhou cavalry practice a new battle formation, it is not new, in the final analysis, increasing the number of cavalry is the key to improving the combat effectiveness of cavalry.

"Cao Liang can increase his troops and increase his horses?" Sima Yi asked.

Sima Shi shook his head and said: "I haven't found out for the time being, the child has followed his father's instructions, and has sent people to lurk near the Bingzhou cavalry camp to monitor it day and night, although they can't infiltrate the camp of the Bingzhou cavalry, but the situation on the periphery is still well understood, if Cao Liang transfers people and horses into the camp, it will definitely not be able to escape the surveillance." ”

Sima Yi nodded, he was more satisfied with Sima Yi's approach, what he was more worried about now was that Cao Liang would follow his example, and also expand the cavalry on a large scale, if Cao Liang spared no effort to do it, Sima Yi's advantage would be gone, and he would be busy for a long time.

However, judging from the current situation, Cao Liang has no plans to expand the cavalry, but it is more normal to think about it, after all, with the financial resources and manpower of a state, it is already a luxury to feed 30,000 cavalry, if Cao Liang increases the number of cavalry, then the first thing to drag down must be the economy of the state, which must be self-aware.

Cao Liang must not be able to afford such an arms race, maybe Cao Liang hid the cavalry in the ravine and conducted new tactical drills, but no matter how he practiced, the cavalry was still cavalry, and the combat method was the same, no matter how much he Cao Liang tossed, he would not be able to play flowers.

On the battlefield, after all, it is still necessary to rely on strength to speak, as long as Sima Jun has the power to crush the cavalry of Bingzhou, Sima Yi believes that Cao Liang will not be able to turn the sky.

Sima Shi continued: "However, the latest intelligence shows that Cao Liang transported a large amount of supplies to the three cavalry battalions, all of which were transported by heavy trucks, and they were tightly covered, and I don't know what they were. ”

"A lot of supplies?" Sima Yi frowned, under normal circumstances, if the grain and grass are transported to supply these materials, there is no need to cover them tightly, if they are really tightly covered, it means that there are some unknown things hidden on these baggage trucks.

Is it a weapon, or is it equipment?

Sima Yi is also very clear that in order to improve the combat effectiveness of the cavalry, Cao Liang spared no effort, the Yue Cavalry Battalion and the Tun Cavalry Battalion are the two of the five schools of the Northern Army.

But it is such an army that can't support the wall in the mud, in the hands of Cao Liang, glowing with new brilliance, the Yue Cavalry Battalion and the Tun Cavalry Battalion, after tempering in actual battles over the years, have grown into an elite division.

The reason why Sima Yi expanded the number of cavalry at any cost was precisely because he was afraid of the Bingzhou cavalry, and it was not easy to defeat the tiger and wolf division of the Bingzhou army.

Since Cao Liang has the means to turn decay into magic, then Sima Yi will not take any move by Cao Liang lightly, this time Cao Liang transferred all the cavalry to the ravine to practice, which is an unusual thing in itself, and the strict security adds a lot of mystery.

Sima Yi, who has always been cautious, was very concerned about Cao Liang's abnormal behavior, and said to Sima Shi: "Do everything possible to infiltrate the camp of the Bingzhou cavalry, and you must find out what kind of reputation Cao Liang is doing, this decisive battle is related to the question of whether our Sima family's great cause can survive, and no leakage can be made." ”

"Do as my father commands!" Sima Shi received the order awe-inspiringly, Sima Yi has always been like a god, Sima Shi will not suspect that he is making some fuss, all in all, there is no big mistake in being careful, and it is also very important to find out Cao Liang's true intentions.

However, the Bingzhou cavalry battalion was extremely strict in terms of garrison, and it was indeed more laborious for the people sent by Sima Shi to infiltrate the interior of the cavalry battalion.

After Sima Shi retreated, he returned to his residence and instructed his subordinates to invite Du Feng over.

Du Feng is the leader of the spy system under Sima Shi, with superb martial arts, wisdom and bravery, and is deeply respected by Sima Shi.

Sima Shi explained to Du Feng Sima Yi's requirements, that is, he must find out the true situation of the Bingzhou cavalry, and Sima Shi hoped that after Du Feng arrived in Bingzhou, he would obtain this information at all costs, and he would also be supported by the entire latent intelligence system in Bingzhou to cooperate with him to complete this mission.

Du Feng surrendered his order, set off overnight, and rushed to Bingzhou with one of his teams.