Because of the heavy casualties and the tactical failure of the defensive line construction, the situation of the Mengyang City defense line is actually very unoptimistic.

Compared with the accurate figures that Jiang Yugang first learned: about 7,000 soldiers and about 7,000 logistics craftsmen, it is likely that the actual number of people left is very unoptimistic.

Actual intelligence is divided into two aspects, on the one hand, the current state of the defensive line, and on the other hand, the actual combat effectiveness.

Compared with the number of combat forces, the information related to the state of the defense line is actually easier to obtain, and it is relatively more accurate. The reason is very simple: Reconnaissance and statistics of living combat strength require a relatively large degree of in-depth investigation into the military camps to be investigated and learn about some relatively confidential information.

As for the situation of the defense line, it only needs a simple observation to do it, after all, every defense line, located in it is the Ming army or the Luchuan army that is responsible for the defense task, these are all things that can be seen clearly at a glance.

Jiang Yu's mastery of intelligence mainly lies in the four key lines of defense in Mengyang City, and the first line of defense is naturally the Mang Castle under his control. It should be noted that Manggu Fort is not equal to Manggu Mountain, Manggu Mountain is actually a general name for a series of mountain ranges southwest of Mengyang City, but these mountains are generally not high in altitude, at most three or four hundred meters, and the size is relatively limited, so there are not many names refined.

For the naming of the mountains of the Mangu Mountains, there are generally two rules.

The first rule is the name of these mountains by people outside Mangu Mountain, generally the mountain where the Mangu Castle with the highest altitude and the largest mountain range is called Manggu Mountain, and the mountain range to the south is called Manggu Mountain Nanshan.

The second rule is the name of the residents of Mangu Mountain, because the mountain on the west side of Mangu Mountain is relatively gentle, and it is closer to the roads and other settlements outside the mountain, so the cottages in Manggu Mountain are basically built here, and in the eyes of residents, only this area is the real Manggu Mountain, while the mountains in other places are given vague terms, such as "north", "east", or "Mengyangcheng" and "Ava".

The scope of Jiang Yugang's ability to grasp the more accurate situation is mainly concentrated in the area where Manggu Castle is located, which seems to be the "north" and "Mengyang City" in the Manggu Mountain situation, as well as the former cottage gathering area on the west side of Manggu Mountain.

These areas are under the direct control of Mang Castle, whether it is the Secret Academy or the Divine Hunting Academy, they are all established by the Intelligence Division in these areas, and this area can be regarded as the place that Jiang Yugang knows best.

In this area, there are about 1,000 troops in total, and the defense line exists in the form of strongholds, and each stronghold theoretically has a hundred households responsible for defense, but according to the information obtained by Jiang Yugang, in fact, each stronghold has only a few dozen people, which is less than 100 people.

That is to say, in fact, on the scattered defense line around Mang Castle, the number of soldiers who can really participate in the battle may be around 500 people, and these people can resist two to three thousand Luchuan troops at most, compared to tens of thousands of Luchuan troops, they can only play a role in blocking the offensive.

Manggu Fort is the place with the largest number of people in these defense lines, and it can be regarded as the core of the defense line of Manggu Mountain. In fact, if it weren't for the establishment of the Manggu Castle and the gathering of the residents in the area of Manggu Mountain, there would be no way to ensure the existence of the Ming army's defense line in the area of Manggu Mountain.

Among the thousands of people organized by Jiang Yugang, although only one or two thousand people may really be able to serve as soldiers, the number of people affected may be five or six thousand or even tens of thousands, not to mention the role played by the three or four thousand residents in the Mang Castle, and the other Luchuan people who did not join the Mang Castle also have the confidence and choice not to participate in the Luchuan Army, and the final effect may be to reduce the gap between the number of one or two thousand people.

And the disappearance of the gap in the number of tens of thousands of people has also become the fundamental reason why the defense line of Manggu Mountain has been able to maintain so far, not only making the Luchuan Army's attack on Manggu Mountain fail, but even making the Luchuan Army basically give up the plan to occupy the stronghold of Manggu Mountain.

However, leaving the area controlled by Mang Ancient Castle, Jiang Yugang could obtain relatively limited information, these places were mainly Mengyang City and the camp north of Mengyang City, as well as the camp northeast of Mengyang City until Heping Town.

In these places, there is no intelligence branch of the Divine Hunting Academy, only the Guardian Hall of the Secret Academy has established a branch, and there are single-digit commissioners working in the branch to provide information to Mangkaku.

One of the differences between the intelligence officers in the Guardian Hall of the Divine Hunting Academy and the Secret Academy is the way and how the intelligence officers work. The way in which the intelligence officers of the Divine Hunt Academy work is relatively open, and basically they make some open contacts and exchanges, so that they can introduce their identities and exchange information in a serious manner.

However, the intelligence officers of the Secret Academy's Observation Hall work in a more passive and secretive way, they generally do not or even cannot disclose their identities, and in some places they have to hide, and at this time, the acquisition of information needs to be obtained through various methods, either secretly infiltrating, or buying the people in it as informants, or the most basic way: secret investigation.

Intelligence obtained in this way is often problematic, especially when it is trained by a person who has learned the methods of training intelligence officers from various books and films, and they have not received any education at all.

Therefore, the accuracy of this information is often very problematic, Jiang Yuyan himself has a relatively clear estimate, and naturally he will not blindly believe the authenticity of this information. He often treats this information in two ways: first, the intelligence is divided into two types, the first is important intelligence or valuable information, for this kind of information, Jiang Yugang will arrange a large number of personnel to conduct an independent investigation of the intelligence, and finally conduct a comprehensive analysis of the investigation results, and finally obtain valuable results; The second is unimportant information, for this kind of information, Jiang Yugang adopts a state of temporary preservation, does not give up directly, but stores all the information, and compares and analyzes it without exceeding the time limit.

And the results of these relatively inaccurate intelligence officers' intelligence summaries are the intelligence summaries of Mengyang City, the camp north of Mengyang City, and the camp between Mengyang City and Heping Town.

The defense of Mengyang City is responsible for the military strength of the four guards, the main is the Qujingwei led by Bai Qianfan, and the more than 2,000 soldiers are divided into two parts, one part is more than 600 people led by Bai Qianfan's cronies and thousands of households, because they have maintained the highest level of reinforcement and equipment supply, so they have always maintained the strongest combat effectiveness, which is the absolute elite of the garrison of Mengyang City.

Although Jiang Yugang had a lot of expectations for the bird guns and new-style bird guns equipped by his troops, he also didn't think that in the case of white-knuckle battles, the troops of Mang Castle were the elite opponents of Bai Qianfan's more than 600 people.

Bai Qianfan's six hundred elites have been serving as the main garrison of Mengyang City on weekdays, stationed in Mengyang City. However, Bai Qianfan has always regarded the Mang Gubao troops as his subordinates who can be trusted, so he made an agreement with Jiang Yugang that he would lead his cronies to the front line of the battle to garrison Biluzhai, while Meng Yangcheng handed over the two battalions to Jiang Yugang and all the remaining 600 people of Pingyiwei.

In addition to the troops of Pingyiwei, Yuezhouwei and Lu Liangwei also sent 200 elites to garrison Mengyangcheng, so the final preparedness of Mengyangcheng is: more than 600 troops of Manggu Castle subordinate to Qujingwei, more than 600 Pingyiwei, 200 elites of Yuezhouwei and 200 elites of Lu Liangwei, a total of 1,600 people.

The city can be used as a candidate, and there are about 2,000 logistics people with certain combat capabilities, and the total number is close to 4,000 people, which is the core of Mengyang City's defense, Mengyang City.

Biluzhai was originally only garrisoned by 500 people from Yuezhou Wei, but now it is 600 people from Bai Qianfan, in addition to about 1,000 logistics people, a total of about 2,000 people, with a certain combat effectiveness.

Finally, the weakest defense line was built in Heping Town, but with the battle around Mengyang City, the defense line of Heping Town was breached, and the defenders moved to Nanma Village in the southwest of Heping Town, which was also because the battle of Heping Town suffered the heaviest defeat.

Jiang Yuyan didn't know the situation of the original battle of Heping Town, because that battle took place before he crossed over to the Ming Dynasty, and it was a battle carried out by the Luchuan Army as a support for Jiangtou City in Mengyang, with the purpose of containment, Jiang Yuyan naturally did not know the situation at that time.

But Jiang Yugang also knew a little about the results of the battle in Heping Town, first of all, some of the soldiers in Manggu Mountain had heard about the results of the battle at that time, and secondly, through the later results, he could also reverse the situation at that time to a certain extent.

Because the defense line of Mengyang City originally had 7,000 soldiers, and later, the number of registered soldiers was only 5,000, of which there were about 2,000 vacancies. Based on the situation, such as the very small number of soldiers in the other guards, it can be inferred that in the original battle of Heping Town, the defenders of Mengyang City paid a huge number of casualties.

The results of that battle were twofold, the first was the loss of the important town of Heping, and since then it has been unable to control the movement of the Luchuan army near Mengyang City; The second is the serious shortage of soldiers in the defense line of Mengyang City, except for the Qujing guards who have been basically preserved because of the main position, the number of soldiers in the other three guards has all been reduced to less than 1,000 after the war, which cannot effectively support the defense line.

This is also the reason why the defense line in the north and northeast of Mengyang City has been crumbling in the past few months, although these defense lines may not be as important as Heping Town, but they are also a serious weakening of the defense line of Mengyang City.

Among these defense lines, the one that worries Jiang Yu the most is the camp defense line in the direction of Heping Town, where there are only more than 500 people of Lu Liangwei and about 2,000 logistics people to defend, on the surface it seems that there are close to 3,000 soldiers, but in fact the combat effectiveness is extremely limited, and a large number of logistics people do not even have sufficient qualified weapons.

They concentrate on the defense line centered on Nanmazhai, and their main task on weekdays is not even military defense, but is responsible for the transportation of materials from Nandian and Longchuan all the way to Mengyang City and Jiangtou City, which is why so many people are arranged on this defense line.

But how effective can the defense line of Nanmazhai be in the battle? Jiang Yugang was quite pessimistic, if he still had a little expectation for Bai Qianfan's elite soldiers, then he had no expectations for the Nanmazhai defense line at all.

In the previous months, the Nanmazhai defense line almost regarded the active movement of the Luchuan Army as air, and completely sat back and watched the activities of the Luchuan Army. The fact that the Luchuan Army was able to gather so many troops in the end cannot be said to have nothing to do with the weakness of the Nanmazhai defensive line.

The uncertainty about the capabilities of these lines of defense is part of the fog of war, and the real fog is actually to be observed from a larger perspective.