The Konoha ninja army's invasion of the Land of the Wind went very smoothly, and they easily captured the first city as planned without encountering any resistance, and used this as the center of time to radiate to the surrounding area.

However, although the strategy of the rope tree is very safe, it takes a long time, and the hatred of the local people of the Land of Wind is also a big hidden danger, and the Konoha ninja army also has to face harassment from the Sand Hidden guerrillas, so there are many difficulties.

Konoha's 150,000 troops seem like a lot, but if you want to ensure the stability and security of the defense zone, you can only occupy a maximum of three city-centric areas at a time.

If this area is exceeded, the Konoha ninja army will lose its absolute superiority in strength, and there is a risk of being broken by the Sand Hidden guerrillas.

However, even if the rope tree is so cautious, Konoha's ninja army is inevitably attacked and harassed by the Sand Hidden guerrillas frequently, and even the towns where the military camps are stationed will be attacked by the Sand Hidden Air Force at night.

Speaking of which, it is necessary to introduce the air force that Shayin Village spent more than ten years and spent a lot of money to build.

Due to the fact that Konoha and ordinary people are very strict about technology, and there are no scientific and technological talents and no industrial base in Sand Hidden Village, it is impossible to imitate Konoha to make flying tools through Chakra technology in a short period of time.

Since there is no condition to play with technology, it is natural for the high-level of Shayin to change their thinking and use ninjutsu to solve problems.

And in the entire ninjutsu system of the sand hide, the one that can be paired with the machine is of course the puppet technique!

Under the leadership of the two Sand Hidden advisors, all the puppeteers of Sand Yin gathered together, and after several years of repeated exploration and experimentation, they finally created a special puppet that can carry people to fly!

The puppet completely abandoned the traditional humanoid structure, and instead took a different approach to the structure of a bird, using wings to fly, and in order to reduce the weight, the entire puppet was originally made of wood. The golem's flight power is converted by the wind chakra provided by the puppeteer through the puppet mechanism.

The original puppet was made to look exactly like a bird, flying with vibrating wings, while the puppeteer stood directly on the back of the puppet and used the chakra line puppet to control it.

However, after experiments, the puppeteer of Sand Hidden found that this structure has many shortcomings, first of all, it is not stable enough, once the speed is too fast, the puppeteer silver is easy to be blown away by the air current, secondly, due to the large size, it is not as flexible as the Konoha Air Force, and finally there are also great defects in defense and attack.

So after some targeted improvements, they changed the head of the puppet to a hollow one, and made the "eyes" transparent, so that the puppeteer can sit in the "cockpit" to freely control the flying puppet, stability, flexibility, defense and other problems have been solved, and other parts of the puppet are also installed with complex long-range weapons, which can shoot hidden weapons to attack, and the belly is filled with cannonballs, which can bombard the ground. The principle of the cannonball is the same as that of the detonation charm, but it is replaced with a coarser material, which is less expensive and more powerful, and it is not convenient for a single person to carry, but it is very suitable for flying golems, and Konoha airships also use the same tool.

In this way, the flying puppet of the sand hidden was completely finalized, and they called it the Flying Eagle One.

After Rope Tree obtained the drawing of the Flying Eagle No. 1 through the dark station, his first reaction was: Isn't this an airplane? He really didn't expect that Sha Yin actually used puppetry to create a ninjutsu version of the plane, although some details were different, but the overall structure was similar.

However, this design does not have much value for the rope tree. Because an airplane is nowhere near as good as a combination of an aircraft and an airship.

The speed of the aircraft is comparable to that of the aircraft and the airship, and the agility of the aircraft is far less than that of the Konoha ninja who uses the moon step to fight with the aircraft, and it is not only difficult to hit the Konoha air force that fights alone in air combat, but also is very easy to destroy, and it is far inferior to the more massive airship in defense and attack.

Moreover, the cost of an airplane is five or six times that of an aircraft, and three airplanes can make an airship, which is far less cost-effective, so the rope tree abandoned the design of the airplane from the beginning. Instead of investing money in airplanes, it is better to design a steel suit for individual combat, or even a larger mecha "Gundam", which is the future development direction of the Konoha Air Force.

The Flying Eagle 1 designed by Sand Hide is not only more expensive, but also has high requirements for the pilot, and must be an elite puppeteer above the middle ninja level to be able to control this huge flying puppet battle. Controlling one Flying Eagle One is equivalent to dominating and controlling three puppets, which requires high skill and chakra. So far, there are only 2,000 air forces in the entire Sand Hide.

It stands to reason that the strength of the Sand Hidden Air Force cannot be the opponent of the Konoha Air Force. Rope Tree has Skywalk Fortress as a base, and the two thousand Shadow Department who are good at the Six Styles and the Star Shinobi under the command of Summer Star are all elite air forces, and the ordinary air force led by Mazo also has tens of thousands. With this kind of military superiority, it is completely possible to protect the airspace of the defense zone, and it is already a blessing that there is no bombing of the Wind Country, how can it be bullied by Sha Yin?

The reason is that the Sand Hidden Air Force has adopted night raid and bombing tactics very obscenely! In the dark night, it is difficult for the air force to see distant targets, unable to detect the other party in time, and it is impossible for Konoha air force to complete the air blockade.

So how did the air force in Shayin determine the target and launch an air attack in the east after the exercise in the dark?

The reason is that the civilians in the various towns in the defense area have already discussed with the guerrillas in Shayin, and they will turn on the lights every night, and even quietly light a bonfire near the barracks to provide coordinates for the air force in Shayin!

In this way, the Sand Hidden Air Force that flew into the Konoha defense area could easily determine the bombing target by the light of the fire on the ground. Although Konoha explicitly forbade civilians to turn on the lights and light fires at night, and often lit bonfires in the field to confuse the Sand Hidden Air Force, the effect was not very good, and it was always destroyed by the ground guerrillas, and the fighting between the two sides became more and more intense.

Therefore, a full month after Konoha invaded the Land of Wind, except for the three areas occupied in the early days, the rest of the time was spent maintaining law and order and pacifying the civilians. The 150,000 Konoha army was unexpectedly unable to give full play to its superiority in the face of the 50,000 Shayin guerrillas.

The high-level leaders of Konoha have become impatient due to the anxiety of the war situation, and many people have proposed to use the three-light policy to directly destroy the towns of the Land of Wind.

But he was vetoed by the rope tree, his purpose is not to destroy the country, but to annex the land and people of the country of wind, slaughter will never make the country of wind succumb, it will only deepen hatred, and will never achieve the goal.