A miracle at the beginning

Third, as the territory expands, the depth of the strike array continues to extend, far beyond the original scale. In the future, this scale will be built larger and larger, but its essential effect is still the same.

For enemies that can be blocked, a few death corridors and arrow towers can easily deal with them. Facing ancient creatures and air forces that cannot be blocked, even twenty death corridors and dozens of arrow towers are useless.

The cost of building mechanical walls, speed bumps, supporting arrow towers, etc. is getting higher and higher, but as the intensity of the attack continues to increase, the effect is not so obvious.

Luo Yu believes that he cannot be limited to the glory of the past strike array. He must constantly change his thinking to achieve better defensive effects.

Times are changing, and defensive ideas must also change.

Now the city wall has been erected, tall and thick, and the defensive effect is N times that of the mechanical wall.

The electric shock tower, light energy cannon and stone bead cannon cover almost the entire map. Once the opponent enters the territory, he will also be hit immediately. In this regard, the first-mover advantage of the strike array has been lost.

In addition, the wall of the strike array will block some of the stone bead cannon's attacks, making this powerful firepower unable to be fully utilized.

Then there is another point. The exit of the strike array needs to be heavily guarded. Is it really wise to let the one-eyed dragon and others guard there?

Wouldn't it be better to let them stay on the tall city wall to shoot arrows, throw stones, throw spears, etc.?

Comprehensively speaking, Luo Yu believes that the strike array is no longer appropriate, and he needs to invest all limited resources in the defense of the city wall.

There are so many stone bricks to repair the strike array, it is really better to let the stone bead cannon fire a few more rounds, the effect will definitely not be worse than the arrow tower shooting randomly there.

So it was decided happily.

Luo Yu said: "Xiao Jin, I plan to dismantle the strike array and deploy the defense force on the city wall. What do you think?"

"Did it dismantle it?"

After thinking about it with his head tilted, Xiao Jin seemed to be confused, so he shook his head and said: "Master, don't ask me, I can't figure it out..."

Luo Yu laughed, pinched her little face, and began to rearrange the defense of the territory.

The first is the arrow tower. There are 17 2-star arrow towers in the territory. Arrow towers are buildings and cannot be easily moved, but they can be moved by spending money in the system mall.

And it doesn't cost much to move.

The city wall is 1,000 meters, and the effective killing range of the 2-star arrow tower is actually a little more than 200 meters in radius, that is, the real effective coverage range of an arrow tower is about 400.

The arrow tower is 5 meters higher than the city wall, which does not affect shooting. Putting three arrow towers on one wall can cover the enemies outside the city wall in all directions.

Luo Yu placed 3 2-star arrow towers on the south, north and west respectively.

As for the remaining 8 2-star arrow towers, they were all placed on the front, that is, the east, to ensure the frontal fire suppression.

In this way, the era of shooting arrows at the beginning of the attack has ended, and the arrow tower has officially changed from the first defense facility to a 200-meter close-range defense building.

After all the arrow towers were moved, Luo Yu moved the war fog box to the city. Under the two boxes, the fog completely enveloped the city.

Next is the automatic crossbow.

Luo Yu has a total of 45 automatic crossbows. These automatic crossbows have a short range and are not very powerful, but they do not take up much space.

All 45 crossbows were installed on the city wall to strengthen the firepower within 100 meters. This thing is still effective for fighting miscellaneous soldiers.

In this way, all the defense facilities in the entire strike array have been moved. Luo Yu was also very straightforward and chose to dismantle the mechanical wall directly.

Dismantling one section at a time, it took half a day to dismantle the entire strike array.

More than 2 million stone bricks and 1 million silver were dismantled. Dismantling will lose a large part of the raw materials, which shows how much Luo Yu invested before.

These two million stone bricks can be said to be timely rain. In the entire city, the defensive floor tiles in the core area of ​​the inner city have been laid, and the outer city is still land, which just needs a large number of stone bricks to lay defensive floor tiles. It is worth it.

Luo Yu put the catapult on the city wall again. The higher it is, the farther it can throw. Now the two-shot catapult can provide a good range output.

Even with so many things, the city wall is still very wide and there is no feeling of crowding. Luo Yu himself wishes that the entire city wall is filled with various defensive equipment, and there is no place to walk...

In this way, the defensive equipment is reset.

With a city, there is naturally a need for a moat. The previous one was filled up because it was too close, and now another one needs to be dug out.

Now there are many tool people and tool animals that can be dug in the territory, and it doesn’t take much time to dig a wide moat.

At the same time, Luo Yu also deeply feels the importance of water elements. At that time, he can let the big octopus hide in the moat and spray water, and cooperate with the electric shock tower to form a large-scale electric induction grid, which is very effective.

At this moment, the huge building complex on the east side disappeared, leaving a piece of white land.

Luo Yu looked at the empty grassland in front of him, and a faint smile appeared on the corner of his mouth.

Of course, the defense of the east entrance would not be abandoned just like that. On the contrary, Luo Yu thought of a good idea.

He planned to lay a trap area at the east entrance, mixing mechanical floor tiles and speed bumps, slowing down one section of the road and installing ground spikes on another section of the road. The two-pronged approach would have a miraculous effect.

And the ancient giant would not smash the ground, right?

If it really wants to smash, let it smash. It's just a thin layer of floor tiles anyway, let it smash.

Wasting time will kill you faster.

Thinking of this, Luo Yu started working directly!

A moment later, a trap square of about 2,000 square meters was built, with 1,000 square meters of speed bumps and 1,000 square meters of mechanical floor tiles interlaced inside. An iron spike was buried in each square meter of mechanical floor drill.

At the same time, the shape and color of the speed bumps and mechanical floor tiles are almost exactly the same, and you can't tell them apart without staring.

It is worth mentioning that the silver spikes were used to catch people alive before, but now silver has too many uses, so it's better to use iron spikes directly, and they are twice as thick as silver spikes.

Tetanus and the like, because there is a hospital, the chance of infection is greatly reduced, so there is no need to worry so much.

Luo Yu walked back to the city wall, looked at the trap square in the east, and nodded with satisfaction.

He looked at the anti-aircraft guns again. Without the strike array, the anti-aircraft guns seemed a little lonely. Luo Yu moved all of them back, and placed eight anti-aircraft guns on the roofs of the small attics on the city wall.

These anti-aircraft guns with a range of 2 kilometers are still somewhat useful, and they are effective in preventing heat stroke.

At this moment, all the defense facilities were completed.