Three months passed quickly.

The excavation operation was very smooth. More than 90% of a tunnel deep into the ground had been completed. Only a short distance was left to open up the nests of alien creatures underground.

The military is also preparing in full swing. The latest laser assault vehicle has been equipped to the team that will be put into the attack as the vanguard. In the past three months, it has explored a set of usage methods and formulated relevant tactics for it.

Although this laser assault vehicle is only equivalent to a heavy machine gun in terms of power, after it was actually put into use, the military concluded that laser weapons are much more useful than heavy machine guns.

Compared to problems such as crane guns that require carrying a large amount of ammunition and may cause jumping and causing accidental injuries during use, laser weapons completely avoid these shortcomings, can provide continuous and stable fire support to the troops, effectively suppress alien creatures, and greatly improve the combat efficiency of the troops.

After all, a heavy machine gun can fire tens of thousands of bullets if used in an underground tunnel for one hour. Even if the accidental injury caused by the jump is not considered, tens of thousands of bullets will require a truck to tow.

Now that laser weapons are available, the consumption of this part of the ammunition can be completely removed.

Because of satisfaction with laser weapons, the military even tried to install them on the spider robots that Chen Xin had previously provided to the military.

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

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

If it weren't for the production of spider robots, it would be more complicated and time-consuming than assault vehicles, and the transformation of existing fire-supported spider robots was also more troublesome. The laser weapon modules would have to be first supplied to the production of assault vehicles. The military may want a large number of spider robots equipped with laser weapons.

But three months was too short. Even if the factory tried hard to produce, the total number of laser weapons delivered to the troops was less than 200.

About 100 of them were installed on assault vehicles, more than 50 were installed on spider robots, and the remaining dozens were used as replacement backups.

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

With these laser weapons, it is naturally impossible for the military to just wait, select the troops with the best combat, and the military sent them into the underground tunnel that had been temporarily converted to defense to test the effectiveness of these new weapons.

It has to be said that laser weapons do have satisfactory results. During the military's test, the troops that organized laser weapons completed the battle at a much higher speed than the original attack, and cleared a tunnel very neatly.

If the military had not had plans to continue the attack and they were asked to retreat directly after the clearance, it would have been said that the tunnel would have been captured like this.

This is undoubtedly much more efficient than the repeated tug-of-war between alien creatures that the military had to do with it before.

This undoubtedly greatly boosted the morale of the military and gave them more confidence in the counter-offensive plan. If they could always use such efficiency to clear underground organisms, the military even felt that they would not need to rely on excavation plans, and they would be sure to clear out the underground alien organisms in Dongting Lake area within six months.

Of course, the premise is that there are no other tricks for alien creatures.

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

During the tunnel excavation process, detectors have always been monitoring the formations around the tunnel to prevent the possibility of breaking through an underground tunnel or cave during the excavation process.

At the same time, it is also monitoring the activities of alien creatures in surrounding tunnels and caves to avoid being dug through tunnels and interfering with construction.

The excavation work has been smooth before. With a line determined by geological exploration, it completely avoided the existing underground tunnels and caves. During the tunnel excavation construction, no interference from alien organisms was encountered.

But when the tunnel was only less than 100 meters away, and the construction team had already begun to expand the tunnel into a forward base, the alien creatures around them were suddenly madly piercing the hole towards the location of the tunnel, as if they were mad, as if they were swearing to dig through the place where the tunnel was dug.

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, they also dismantled them in the shortest time and evacuated them from the ground with the evacuated workers.

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

After the construction team evacuated, the army quickly entered the tunnel and prepared for battle based on the detected alien biological activities.

When the first worker's body dug through the wall of the tunnel and drilled out, a laser light that was invisible to the naked eye suddenly shone on its head, and then it was blown into a knocked watermelon in less than a second.

Immediately, more alien creatures poured into the tunnel and began to attack upwards.

However, humans have already been prepared. Dozens of laser weapons kept firing at these alien creatures with the help of the fire control system. Almost instantly, the tunnel was filled with corpses of alien creatures, and even affected the offensive of alien creatures.

But these alien creatures did not stop, but continued to completely dig the tunnel with huge casualties, allowing more combat bodies and worker ants bodies to pour into the tunnel.

Because the tunnel is almost a straight line, humans naturally no longer have the limitations of fighting in underground tunnels that were limited by the winding terrain and unable to exert their weapon advantages. While the newly equipped laser weapons were powerful, heavy machine guns and light machine guns were not willing to fall behind. While sprinkling a large amount of ammunition, they sent deaths to alien creatures.

However, out of concerns about blowing up the tunnel, the military still did not use large-caliber artillery and powerful explosives.

The Yan State military's counterattack on the underground alien biological nests in Dongting Lake area was launched without the human side's side's expectations but was ready.
Chapter completed!