Three months passed quickly.

The excavation operation is going very smoothly. More than 90% of a deep underground tunnel has been completed, and only the last short distance can open up the nest of alien creatures under the ground.

The military is also making intensive preparations. The latest laser assault vehicle has been equipped to the team that will be put into the attack as the leading force, and has explored a set of use methods and formulated relevant tactics for it in the past three months.

Although this laser assault vehicle is only as powerful as a heavy machine gun, after it is actually put into use, the military has concluded that laser weapons are much easier to use than machine guns.

Compared with the crane machine gun, which needs to carry a large amount of ammunition and may cause accidental injury due to bullet jumping in use, the laser weapon completely avoids these shortcomings, can provide continuous and stable fire support for the army, effectively suppress alien organisms, and greatly improve the combat efficiency of the army.

After all, when a heavy machine gun is used in an underground tunnel for an hour, it can shoot tens of thousands of bullets. Even without considering the accidental injury caused by bullet jumping, tens of thousands of bullets need to be towed by a truck.

Now with laser weapons, the consumption of this part of ammunition can be completely removed.

Satisfied with the laser weapon, the military even tried to install it on the spider robot previously provided by Chen Xin to the military.

Compared with assault vehicles, spider robots are obviously more suitable for the tunnel environment. Originally, Chen Xin also provided the military with models equipped with heavy machine guns, and the military is also very satisfied with their use.

However, compared with the current version equipped with laser weapons, the original version of heavy machine gun is naturally less attractive.

If the production of spider robots is not more complex and time-consuming than assault vehicles, the transformation of existing fire support spider robots is also more troublesome, and the laser weapon module should be supplied to the production of assault vehicles first. The military may want a large number of spider robots equipped with laser weapons.

But three months is really too short. Even if the factory worked hard, the total number of laser weapons finally delivered to the army is less than 200.

Among them, more than 100 are installed on assault vehicles, more than 50 are installed on spider robots, and the remaining dozens are used as replacement.

Among the dozens of spare laser weapons, more than a dozen were tentatively installed on the Gongshi Titan by some thoughtful technicians. After some tests, they also had good results.

With these laser weapons, the military can't just wait and select the best troops. The military sent them into the underground tunnels that have been temporarily turned into defense to test the use effect of these new weapons.

It has to be said that laser weapons do have satisfactory results. In the military test, the troops organized with laser weapons completed the operation at a much higher speed than the original attack, and cleaned up a tunnel very cleanly.

If the military hadn't planned to continue the attack and let them withdraw directly after the suppression, it can't be said that this tunnel would have been attacked.

This is undoubtedly much more efficient than the previous military's laborious tug of war with alien creatures.

This has undoubtedly greatly boosted the morale of the military and given them more confidence in the counter offensive plan. If they can always eliminate underground creatures with such efficiency, the military even feels that they do not need to rely on the excavation plan, and they are sure to eliminate the alien creatures underground in the Dongting Lake area within six months.

Of course, if there are no other moths in alien life.

But things are often expected. According to Murphy's theorem, if a bad thing may happen, it will happen. When there is only a short distance left in the excavation operation, and the construction team expands the tunnel according to the original plan to build the forward base, the accident still happened.

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In the process of tunnel excavation, detectors have been monitoring the stratum around the tunnel to prevent the possibility of penetrating an underground tunnel or cave in the process of tunneling.

At the same time, it is also monitoring the activities of alien organisms in the surrounding tunnels and caves to avoid tunneling and interference to the construction.

The previous excavation work has been very smooth. Relying on a line determined by geological exploration, it completely avoided the existing underground tunnels and caves. During the tunnel excavation construction, it did not encounter the interference of alien organisms.

However, when the tunnel excavation was only less than 100 meters away and the construction team had begun to expand the tunnel into a forward base, the surrounding alien creatures were like crazy. Suddenly, they all made crazy holes towards the tunnel excavation position, with a momentum of vowing to dig through here.

This undoubtedly triggered the alarm. The construction team adopted an emergency plan and hurriedly evacuated all the workers. At the same time, in order to protect the precious shield machine, it was also disassembled in the shortest time and evacuated from the ground together with the evacuated workers

It took three months to dig, but it took less than half a day to retreat.

After the evacuation of the construction team, the army conveniently and quickly entered the tunnel and prepared for battle according to the detected alien biological activities.

When the first worker ant body dug through the wall of the tunnel and drilled out, an invisible laser instantly shone on its head, and then fried it into a smashed watermelon in less than a second.

Then, more alien creatures poured into the tunnel and began to attack upward.

However, human beings have long been ready. With the help of the fire control system, dozens of laser weapons continue to shoot these alien creatures. Almost instantly, the tunnel is filled with the bodies of alien creatures, and even the offensive of alien creatures is affected.

But these alien creatures did not stop, but constantly risked huge casualties to completely dig the tunnel, allowing more combat daughters and worker ant daughters to flow into the tunnel.

Because the tunnel is almost a straight line, human beings naturally do not have the limitations of previous operations in underground tunnels, which are limited by the tortuous terrain and unable to give full play to the advantages of weapons. While the newly equipped laser weapons are powerful, heavy machine guns and light machine guns do not want to fall behind. They sprinkle a lot of ammunition and send death to alien creatures at the same time.

However, for fear of collapsing the tunnel, the military still did not use large-diameter artillery and powerful explosives.

The Anti Japanese military's fight against the underground alien nest in the Dongting Lake area was launched when the human side did not expect it, but was ready.

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