The Southern Barbarian Mountains, where the Garuda Fort is located.

Next to the river, a small dock for small boats has been built, and more than a dozen small boats are constantly carrying supplies back and forth.

At the foot of the hillside, the terracotta bricks and stones needed to build the fortress have long been piled up into square hills, and the number of them, not to mention the construction of a fortress, is definitely more than enough to build a city wall.

However, Kitayama did not instruct her people to start building the fort because they did not know how to build it.

To say that there are a lot of fortresses and cities built by Haotian, there are all kinds of them.

For example, the Salt Stone City and Haotian Castle built around a mountain.

Another example is the defenses built in the Netherworld.

Also, the new city built by the Garuda camp on the bank of the Haotian River.

It can be said that whether it is on flat land or in a valley, or building a fortress around a mountain, Beishan Amu will, but she will not build a fortress on the hillside.

This hillside is sloping, how can you build a fortress?

In fact, if Zhao Hao was not there, they would not have been able to build any fortress and city, because the human beings in ancient times had not yet developed to the extent of building city fortresses, including the Taihua Department, and the reason why they would build cities and fortresses was not to that extent, but the result of the so-called divine teaching.

Zhao Hao has naturally seen the fortress built on this hillside, and there are many types he has seen.

The reason why he didn't rush to order people to start construction was that he wanted to design a typical example so that the generals of the Eighth Battalion could imitate it.

After all, there are not one or two fortresses that need to be built in the mountains of the Southern Barbarians in the future, and it is unlikely that he will guide them one by one on the spot, so he must make a typical example of the fortresses built under various terrains, so that the generals of the eighth battalion can imitate them according to these examples.

At this point, there are good examples of forts built around a hill and in a valley? Even? There are examples of small forts built on the top of the hill, but there are no examples built on the hillside.

So? What kind of structure was chosen for the fortress built on the hillside?

Zhao Hao pondered for a long time? Or was it decided to adopt a trapezoidal structure? That is, it is like a ladder, one step at a time.

Of course? Isn't this the standard ladder of equal spacing? The so-called stepped structure also has to determine the length of a ladder according to the topography.

To put it simply, if it is a place with a strong inclination, then according to the span of the foot, step by step? If it's a gentler place? Then dig into a platform, and dig as long as you can.

This structure is more complicated, and it must be explained well, and after the personnel and materials are almost ready, Zhao Hao recruited Beishan Mother and Ji Rushuang and others to the big tent in the temporary camp to start explaining.

This time? Can't stock too much of your supplies due to limited capacity? The other side is not a wild jungle, but the same southern barbarian mountains? It is also impossible to transport more supplies by land, so? Zhao Hao didn't organize too many people? Roughly? That is, the 400 elites of the Garuda battalion and the 200 guards of the personal guard battalion, a total of about 600 people.

In the big tent, there are not many people who can come to listen to his explanation, that is, Beishan Auntie and the two captains under her, as well as Ji Rushuang and the two captains of the personal guard battalion.

After everyone arrived, Zhao Hao picked up a brush and drew it on a sheepskin that had already been fixed vertically behind him.

The reason why he used sheepskin to draw sketches was that there was no way, because there was no such thing as paper at this time, and of course, this sheepskin would not be wasted, and it could still be used after painting, but the inside would be a little dark.

What he drew was not complicated, that is, a rough diagram of a hillside and a sketch of several steps.

After the drawing, he pointed to the schematic diagram of the hillside and said: "This is the hillside where the fortress is to be built outside, and as you know, this hillside is sloping, so how do you build a fortress on it?" Very simply, we use this step structure, and the walls on both sides use this step structure. There are such stairs on the side of Netherworld, you should remember it. It's just that this time we are not only repairing the steps, but also repairing the walls on both sides, and the base of the city wall at the bottom. ”

As soon as he said this, everyone roughly understood.

The steps of the Netherworld Valley have been seen by everyone, but of course, the steps there are paved with stone and terracotta bricks along the hillside, and they do not look like they have been built into any walls.

However, it was enough for them to understand the shape of the stepped walls.

Immediately afterwards, Zhao Hao continued to explain: "The foundation of this step-type city wall is also to be dug underneath, but when digging the foundation and filling the city wall, it is similar to the general city wall, and it can be directly dug and filled, but the top of the city wall must be built into the shape of steps." Also, this step is not necessarily so evenly built all the way up, in the relatively gentle place of the hillside, we can also build some platforms, used to build arrow towers or stand people. ”

As he spoke, he drew a long line flat on top of the original steps, and then added a few steps on top of the line.

As soon as he explained this, everyone basically understood how to build the wall on this hillside.

Immediately afterwards, he continued to explain: "As for the barracks, it should also be based on the terrain of the hillside, this hillside is not very steep, and many places are relatively gentle, and in those gentle places, we can also dig out pieces of flat land one after another to build the barracks, which is similar to Salt Stone City and Haotian Fort." ”

At this point, how to build a fortress on the hillside was roughly explained, and everyone's faces showed a sudden look.

Seeing this, Zhao Hao nodded slightly, and then asked, "Do you have any questions?" ”

Unexpectedly, there are really people who have problems.

As soon as his words fell, Zhao Yi asked cautiously, "What if we dig up the Heaven Replenishing Divine Stone?" ”

This one!

Zhao Hao really didn't think about this problem, because his purpose this time was to build a fortress to protect the Divine Tree, not to dig up the Heavenly Divine Stone.

Speaking of which, this is really possible, because there will be a lot of mending heaven god stones around the sacred tree, and the depth of the mending heaven god stone is not regular, and it is really possible to dig out the mending heaven god stone when digging the foundation of the city wall and barracks.

Zhao Hao thought about it, and then said decisively: "Where you dig it, bury it there, just bury it deeper." This time, we are not digging up the Heavenly God Stone, but to keep the Divine Tree, so we don't take it out when we dig up the Heavenly God Stone, and bury it directly. ”

Next, there was no problem with everyone, Zhao Hao took everyone to the hillside outside, and explained on the spot according to the terrain, where the steps should be repaired, where the platform should be dug, and where the barracks were built, he made a detailed explanation.

After everyone roughly figured it out, the construction of Garuda Fort began to officially begin, although the number of people who built the fortress this time was not as many as last time in the Netherworld, but the speed of construction was still quite fast, because this time there was no wall of the amazing height of the Netherworld Valley, except for the fact that it was more troublesome to build a step-type wall, the others were basically similar to building a fortress on flat ground.

About a month later, a majestic fortress appeared on the slope of the mountain where the Divine Tree was located, and Zhao Hao took Ji Rushuang's brothers and sisters to begin to plan the road to Haotian Castle while cleaning up the existence of alien beasts and close to divine beasts along the way.