After pondering for a long time, Sun Chengzong finally thought of a good way, and he didn't need Zhu Cijiong's encouragement, so he said directly: "Your Majesty, Weichen thinks that it is still necessary to use a fortress to deal with cavalry. “

When Zhu Cijiong heard this, his head was full of black lines, and he was still building a fortress, the fortress could indeed restrain the cavalry, and Huang Taiji was also very afraid of Sun Chengzong's fortress advance tactics, but the problem was that the Monan region was five times larger than the Liaodong region, and the fortress was advancing, and it was going to advance to what year and month!

Sun Chengzong didn't pay attention to Zhu Cijiong's reaction, but picked up the ash pole on the table, stood up directly, and pointed to a few grasslands on the sand table model and said: "Weichen has carefully observed, these grasslands are closed or semi-closed basins, and the premise is that the Jiannu want to be haunted, the premise is that they must first come out of the basin, if we build small cities at the exits of each basin and block them inside, then they don't want to be haunted, so that we can send elite soldiers to catch turtles in an urn." And won't the emperor want to garrison troops in Monan in the future, these small cities can also be used as a place for troops in the future after they are built, and they are not wasted at all. “

This seems to make some sense, Zhu Cijiong is already a little moved, but he looked at the undulating Monan area, there are more than one or two exits from this prairie, I am afraid that there will be a lot of small cities to be built!

Sure enough, Sun Chengzong pointed to the periphery of several prairies and analyzed: "Weichen has preliminarily estimated that in order to limit the mobility of the Jiannu cavalry, at least about twenty small cities should be built on the periphery of the three grasslands, and these cities must resist the onslaught of the Jiannu, with our current equipment, each city must be equipped with about 20,000 people, and the soldiers defending the city need to be stationed at 400,000 based on the calculation of twenty cities. In other words, the entire strategy only needs 600,000 to 700,000 troops, and Jiannu will definitely not be able to run. “

The number of people is a lot less, but the time is a lot longer, whether this tactic of exchanging time for people is feasible depends on how long it will take, Zhu Cijiong couldn't help asking: "Taifu, do you probably estimate how long it will take." “

Sun Chengzong thought for a while, pointed to the sand table model and continued: "Weichen wants to divide the fortress into three major parts, the first is the middle of Chahar, Horqin, and Hailar, where about ten small cities will be built, if you add the defensive force to prevent Jiannu from sneaking attacks during the construction of the fortress, it will take about 300,000 horses and horses to build for about half a year; The second is north of the Hailar steppe, where about five forts need to be built, and it takes about 200,000 horses to build about three months; The third is east of the Chahar steppe, which is also about five forts, and it also takes 200,000 horses to build for about three months. If it comes in stages, it will take about a year for 500,000 horses, and if it starts at the same time, it will take about half a year for 700,000 horses. “

At least half a year? It seems that he can't catch up with his wedding! But at most, it will only take a year, and the time it takes is not too long, it seems, probably, it seems to be okay, just when Zhu Cijiong hesitated, another general he had been looking forward to for a long time spoke, and Sun Chuanting, the commander of the Qin army, stood up and asked respectfully: "Lord Taifu, it won't take so long to build twenty small cities of twenty or thirty thousand people, right?" “

When Sun Chengzong heard this, he shook his head and sighed: "I also want to hurry, but in that case, the manpower will be consumed, and it is not worth taking this risk." “

Sun Chuanting hurriedly reminded: "Gong Ming and Wen Fu and I are still holding 500,000 prisoners of anti-thieves, and if we take them over, we will definitely be able to repair these fortresses within a month, and we don't need to transfer a single soldier!" “

When Zhu Cijiong heard this, his eyes lit up, yes, there are still 500,000 captives, he forgot for a while, now it's okay, it looks like he is expected to catch up with his big wedding!

Sun Chengzong was a little worried and asked, "Build a city with the prisoners of the thieves?" Isn't it a bit inappropriate, what if they want to mutiny? “

Sun Chuanting explained: "Please rest assured, Lord Taifu, these captives have been tamed and obedient, and the emperor has also decreed that as long as they serve five years of hard labor, they will be freed, and as long as they behave well, they will also be allocated land and necessary living materials so that they can live." So now they are very motivated, and there is no need to worry about them being disobedient. “

When Sun Chengzong heard this, he nodded with satisfaction: "In this case, there will be no problem, if these captives are taken over to build a city, we can organize elite soldiers to catch turtles in the urn before the year!" “

It seems that he is expected to clean up Jiannu and occupy Monan within the year, Zhu Cijiong is also overjoyed, he was about to stand up and make a decision, but another person he didn't expect suddenly stood up.

I saw Zheng Zhilong stand up inexplicably, and arched his hand at Sun Chengzong: "Lord Taifu, 20,000 people stationed in each city is a bit much, if it is built into a fortress, 10,000 people in a fortress is enough, and it is useless for Huang Taiji to mobilize many people!" “

Sun Chengzong hadn't been to the southeast coast in the past few years, so he naturally didn't know what the fortress was. What does it look like? “

When Zheng Zhilong heard this, he was immediately blind, how to describe such a big castle, he didn't have any artistic cells, and he couldn't paint.

At this time, our Chongzheng Emperor Zhu Cijiong stood up excitedly and said to Wang Zhengnan, who was under him: "Come to Xian, go get some clay to make a sand table." “

When Wang Zhengnan heard this, he immediately stood up and ran to the corner next to him, picked up a small two-foot square box, and respectfully placed it on the table in front of Zhu Cijiong.

The generals saw that the emperor stood up again, and had to stand up with all of them, they all looked at the box a little inexplicably, which was adjusted clay, which they all knew that the clay used when making the sand table was generally packed in this sealed box to prevent the clay from becoming hard after drying, but what did the emperor do with clay?

In order to draw some things in later generations, Zhu Cijiong specially studied painting with the great painter Liu Ruozai for a long time, and his artistic cells are still very sufficient, and when he built the sand table model, he played with this 'mud' with his own hands, and he had a good time.

I saw him open the sealed wooden box, directly use the small trowel inside to pick out a large lump of clay, throw it on the table, and then wipe it a few times, a mound-shaped hill bag was formed, he pointed to the mound model with a trowel and said: "Taifu, you see, most of the small mounds in the Monan area are like this. “

Sun Chengzong looked at the clay that Zhu Cijiong was fiddling with, and then looked at the sand table model on the table, there were indeed many such protrusions on it, and this was just a mound that was magnified several times.

Zhu Cijiong then directly used a trowel to 'carve' on the mound model, and introduced while carving: "The fortress refers to a castle with many edges and corners, this kind of castle has many blind spots, no matter which angle the enemy attacks from which angle they can't see or reach, and the fortress is still hierarchical, from a high place, whether it is with a musket or artillery, or even with a grenade, it can cause huge damage to the enemy army below, the hills in this desert area are the most suitable for building a fortress, as long as the bottom is dug up a little bit, build a city wall, Then dig a little more in the middle, build a city wall, and then level the top, build a barracks and a city wall, and the fortress will be formed. “