The alienated beasts looked curiously, and turned around and just rushed in. They found that the human early warning system did not react at all, but this did not stop them. Their mission was not to simply attack the human front-line defensive positions, because they knew that this simplicity did not make much sense.

The layout of human defense lines has a common feature. The distribution of troops is light in front and heavy in the back, and the firepower is heavy in front and light in the back. Simply attacking the back is very likely to tear open the first line of defense of humans and not hit the core position of humans. It is not very impressive to cause damage to human forces.

As for whether we can change our thinking and directly tear down the second line of defense of human beings. We are cooperating with our own army to attack the first line of defense of human beings, we will first cut off the opponent's retreat and reinforcement support channels, and conduct strong attacks to ensure that we continuously conquer the two lines of defense of human beings? This is also impossible.

The Chinese army can naturally think of this problem. The way to deal with it is very simple, that is, most of the second line of defense, including the second line of defense, use permanent fortresses as defensive positions, so that you can't bite them.

As for attacking the third line of defense of humans, it is even more secondary. Each line of defense of humans is about ten kilometers away. Except for the low degree of perfection of the first line of defense, they have the possibility of success in this back attack. However, the shooting line is basically swept across the second and third line of defense behind the problem, and the shooting line can basically be seen at a glance. The opportunity there is to attack you.

Moreover, the closer you get to the rear defense line, the greater the deeper the assault force needs to be inserted into the deeper range. What will the consequences will be brought about? The most embarrassing question: when attacking the troops, even if they successfully cut off the rear defense line of humans and hold on for about two days, what is the result?

Their main army is not capable, and they can break through three or more human defense lines in a short period of two days. This is impossible to reach a factual problem. Under the basic conditions of their main army, they have no need to do anything to attack, which is just to make themselves uncomfortable.

At the same time, the human defense line is constantly yearning for the expansion outside every year. The so-called first defense line is actually the prominent part of the continuous expansion outside. With the help of the firepower network of the old side, it is a method of swallowing up more land bit by bit. This is also the reason why the remaining military fortresses can be seen from time to time on some special streets of many cities.

Because of a very simple truth, it used to be the first front line, but the cities behind it were constantly expanding, and they were slowly using these land use problems. Of course, many cities now have inherent problems. The speed of urban expansion far exceeds the speed of military expansion, forcing the military to act and have to accelerate.

"Hiss! Hiss! Hiss!" The new alien beast units are quickly leading their compatriots through the smell left in the air. At the same time, this time, they did not use the traditional way of fighting and used beast sea tactics to overwhelm all human resistance, but now it is different.

The recovery level of human industry is also constantly advancing rapidly and far exceeding their evolutionary speed, which has forced senior commanders of alienated beasts to go out for new changes, such as learning about human permeability operations and sending a large number of elite combat units to attack the cities behind humans.

The military strength of human beings is limited, and it is impossible for every position to have tens of thousands of troops. This is not unrealistic. Human beings do not have such a large army and human resources to use. The population is limited, and it is impossible for three to five soldiers in the ten young and strong people to join the army. This is too much pressure on society and the proportion is too high. Even if it is a 10-to-1 ratio, it is already terrible enough.

"What is this?" Several soldiers patrolling the Chinese country suddenly saw a large number of strange footprints on the ground, which made them curiously gesture.

"No! I'll give you a warning quickly! It's an alienated beast!!!" A veteran recognized it at a glance. The footprints on the ground were not brought by other animals, but were the footprints of the alienated beast.

"Is the front line command? We are the 3165 patrol team, we discovered special circumstances! We discovered special circumstances! We found a large number of alienated beast movement footprints on the 3165 patrol road! Please inform the front line to prepare immediately, please inform the front line to prepare sufficiently!" The telegrapher in the patrol team quickly issued a warning.

"Notify! All first-level combat preparations! All first-level combat preparations!" After receiving the warning from the patrol team, the frontline combat command decisively issued preparations for all frontlines to enter the battle. They had suffered losses before, and they could not have suffered losses for the same time.

"Stop playing! Everyone enters the defense line! First-level combat preparation! First-level combat preparation!" A large number of soldiers on the front trenches ran into the trenches and were fully armed. All the light and heavy machine guns in the fortress were opened. At the same time, in order to prevent back stabbing, the trenches basically had the idea of ​​designing two-sided combat.

The soldiers were very nervous, and cold sweat kept on their foreheads. They felt a little uncomfortable with their hands. They pressed the outside of the plate-stripping guard ring, but they did not reach into the guard ring, for fear that their nervous action would suddenly trigger fire.

Some soldiers took photos of their family and took them in their hands to look at them. They silently put them in their own bags. In their firm eyes, they revealed a trace of attachment to their family. They fought not only for their own people, but also for their own family. If they failed, they spent most of their lives to build their homes and then they would be destroyed by those stinky alienated beasts. They would never allow them.

"We have spent so many painful years. We absolutely do not want to recall the darkness of the past. We have to bear the pain in the past." Some old officers stood firmly on their posts, picked up their weapons, and began the final pre-war mobilization, encouraging the soldiers to show their courage, not only for themselves, but also for their families.

"Soldiers! Be prepared for battle! Let the miscellaneous people know our anger!" The officers cheered the soldiers on their feet. The soldiers looked at the squad leader, the platoon leader and the company commander, and they felt very at ease. This kind of spiritual comfort made the soldiers' morale soar.
Chapter completed!