There are many high towers around the fortress, surrounded by a warning tower that is as high as four meters high and a hundred meters ahead.

There are nine such sentry towers, and they are connected to the main body of the fortress by tunnels.

Each of these sentry towers can garrison more than a hundred troops.

It has dense shooting ports open on it, allowing the garrison soldiers to descend and output firepower to the enemy in the distance.

At the same time, there are artillery positions on the top of each tower, which can park six artillery pieces and launch artillery bombardment on long-distance enemy troops.

The entire fortress was built into the shape of a hexagram, with the spike tops of each star and an additional ring fortification.

This is an advanced version of the previous bastion design, and more troops can be stayed in this circular business.

For Mongolian soldiers who want to attack the fortress, everyone will be fired by rifles from multiple directions.

What surprised Shi Tianze and Wanyan Chen even more was that this fortress, which did not seem to be huge, also built an underground system that was much larger than the fortress itself.

In this huge dungeon, there are command centers and barracks, warehouses for storing food and ammunition, water storage stations for specializing in storing edible water, and even storage for forage and large stables.

At the same time, they also stretched out countless tunnels to all directions outside the fortress.

It seems that if this fortress wants to maintain its stability, it only takes a thousand people to guard it as solid as a solid person.

But at the same time, it can also accommodate up to five thousand soldiers.

The four thousand cavalrymen can set out at any time to attack or counterattack the Mongolian army's side and rear.

This fortress was built at an extremely fast speed, and the huge construction site where day and night construction is built is always full of people.

Various engineering equipment such as steam-driven tamping machinery, spiral pile drilling machines, pumps and hoist lifting systems, steaming out, making deafening construction noises, making it reveal the hideous face of the giant beast before it was built.

This is a terrifying scene that Monk Wanyan Chen and Shi Tianze have never seen before. They woke up almost every morning and found that this fortress became unrecognizable compared to last night, which shocked the two generals! Now, Monk Wanyan Chen finally figured it out.

Why did Tongzhou be managed so strongly by Shen Mo in these short years?

It turns out that the workers in Tongzhou have always worked like this! Another reason is that Shen Mo has never lacked labor... When he thought of this, Monk Wanyan Chen couldn't help but smile bitterly.

Of course, the contribution of his migrant workers in Jin Guo is indispensable in these labor forces who work day and night.

But they didn't expect that what really shocked them was still behind.

...When the construction of the fortress was basically completed, the firepower equipment installed inside also hit the shore along with the supply ships.

When Monk Wanyan Chen saw a giant cannon that was getting on and off the pier, the muzzle was as thick as his waist, the scene surprised him so much that his tongue was almost frostbite in the cold wind! Shen Mo transported four such giant cannons, which were the replica version of the Great Demon King Fortress cannon back then.

In the Battle of Chongming Island, the Great Demon King's artillery used its powerful attack to prove its useful value as a fortress heavy artillery.

After this, Shen Mo immediately improved the design of this large-caliber mortar.

Now its cannon chamber has reached a diameter of 34 centimeters, and the shells shot out weigh 118 kilograms.

With the rapid development of Tongzhou's metal smelting industry, the gun's muzzle is only two meters long, but it can eject the heavy projectile at an angle of 45 degrees to 1,200 meters away.

Such a shooting distance is enough to make the Mongolian army's iron cannon with a range of one mile (that is, five hundred meters) not even connected to the fortress, let alone those giant catapults that are used to throw tens of thousands of enemies and have a range of only three hundred meters.

Of course, this kind of artillery is still extremely heavy. The total weight of the gun body, the buffering mechanism, and the rail system used to move it has exceeded six tons.

So it's the same problem as before. This crazy big guy is simply unavailable in the field.

It is mainly used to defend places like Thunder Fortress.

After being armed by the Great Demon King, the enemy's attempt to use the sea of ​​people to subdue the fortress was completely ignorant.

Because a giant shell was bombarded with this thing, it was enough to defeat the four or five Mongolian 100 teams that charged forward.

Moreover, its heavy and shocking cannon sound will greatly impact the morale of the enemy.

When it roars at first, no one will have the courage to continue charging forward with its bombardment.

...At this time, Shi Tianze finally understood what Shen Mo said after seeing the Great Demon King's test shooting on the fortress city.

It was when he and the commander eavesdropped on the staff department at that time. Shen Mo walked to the conference room to speak to the young staff.

At that time, Shen Mo said that because new equipment was to be transported to Yanshan defense line, it is actually not accurate to estimate the number of troops garrisoned on the defense line in advance.

What Shen Mo said at that time was obviously such a scary big guy.

When testing the cannon, Shi Tianze stood two miles away, and when the shell exploded, he could feel the ground under his feet trembling with the roar of the giant cannon.

Although Shi Tianze had been mentally prepared for the Tongzhou Army's firearms to be so powerful.

But he never dreamed that it would be so strong! Shen Mo would place giant artillery like this at various main defense points on the Yanshan line.

In addition to the cliff terrain at the mouth of Feihu, it is easy to cause collapse under the bombardment of giant cannons.

Such giant artillery has about four to six gates in every pass city like Gubeikou.

Building such a giant cannon costs a lot, but it is a one-time investment.

For Shen Mo's Yanshan defense line, he is a powerful tool to double his combat effectiveness.

With the existence of the Great Devil on the Yanshan defense line, only six artillery groups, nearly 120 artillery soldiers, can replace the functions of thousands of defenders.

Taking Gubeikou as an example, after being equipped with six major demon cannons, the number of defenders at this pass can be set to be within one thousand.

In other words, the entire Yanshan defense line has 12,000 troops, which is enough to defend.

Among the 2,000 people, there were also 1,000 Tongzhou army scouts, patrolling and provoking the battlefield in various places north of Yanshan Mountain, covering the battlefield area.

At the same time, there is also Awang's 1,000 werewolf troops, responsible for communication and reconnaissance and tracking.

It even includes two thousand war horses that are ready to support strategic points in various places at any time.

In other words, there are actually only eight thousand troops stationed in various passes.

This has caused the military expenditure on Yanshan defense line to be spent sharply.
Chapter completed!