With the deafening siren sounding, the interior of the institute at this time also became a little chaotic, and it was the first time that these militants who had been holding out here for several years had heard such an alarm, and in the previous years, it was difficult for them to encounter some of their own enemies, even if they were elite at that time, but after such a long time, their strength had also declined greatly.

"What happened, why did the sirens sound!" At this time, on the second floor of the research institute, a burly militant with some fat on his body ran out of the room. And he is Brandon, who is in charge of the defense of the entire research institute, and he used to be the vice captain of the Ross Guard, and he has been sent to the research institute for so long, and he has grown some fat when he was originally full of muscles.

"Captain, the brother guarding the gate pressed the alarm button, but we don't know what happened yet!" said one of the militants running up to Brandon.

"Did you hear the gunshot?" asked Brandon, who frowned, although Brandon's strength has decreased a little over the years, the vigilance in his heart has not decreased much. And of course he knew the importance of this research institute to his leader and even the entire evil wolf mercenary group, once something went wrong in the research institute, I am afraid that no one would be able to eat and walk around at that time.

And the moment he heard the siren, Brandon remembered what had happened a few days ago. Because just a few days ago, his own leader, Rose, demanded that the institute withdraw all personnel from the periphery, and also ask everyone to strengthen the defense of the institute, and even if necessary, turn the entire institute into a ruin. And now, the sudden sound of the sirens had to keep Brandon on the alert.

More importantly, at this time, Brandon also remembered a crucial thing, that is, there is only one way to the outside world in the institute, if the attacker controls the mountain gate at this time, it means that everyone is trapped in the institute. And although Brandon knew that there was a tunnel under the institute that led to the outside world, and although this tunnel was originally built for people to evacuate in case of emergency, there were only a few people who could retreat.

To put it mildly, the most valuable thing in the institute is not the hunters, nor the lives of these militants, but the equipment! These things are collected by Ross from all over the world at a huge cost, people can be retrained when they are gone, hunters can be re-studied, but if the equipment is lost, everything is gone.

In order to guard the research institute and protect these things, Rose had arranged more than 300 mercenaries in the institute long ago, and after Moon disappeared, Rose sent most of the people in the nearby villages and towns into the institute, and now the actual strength of the institute has reached more than 500 people.

"Contact the leader immediately and tell him the information here!" Brandon, who thought of this, hurriedly said, although he didn't know the situation of these attackers, but it must be that the people who came were not good, and the most important thing now is to tell Ross, who is thousands of miles away, what happened here, hoping that Rose, who can get the news, can send reinforcements in time.

Although Brandon has sophisticated weapons and equipment in his hands, and has more than 500 troops in his hands. Brandon is confident that he will hold the Institute, but only if they can regain control of the Institute's gates. If the whole research institute is compared to a small dark room, then the mountain gate is the window in the small black room. Through the mountain gate, they could barely know what was going on outside. Moreover, if they directly blew up the mountain gate, or even the entire mountain, Brandon at that time probably wouldn't even have a chance to cry!

"Everyone acts according to the plan, and then immediately send someone to reconnoiter the mountain gate to find out what happened, we must take the mountain gate again at all costs!" said Brandon, who was staring at the front with his eyes firmly in front, at this time he could only pray that there were not many attackers at the mountain gate, because if he wanted to take the mountain gate, the two anti-aircraft machine guns were also a tricky matter.

"Understood!" the militant nodded, and left the place, looking like he had gone to gather his men.

At this time, the alarm in the entire research institute was still ringing in the research institute, in addition to the militants who were on daily patrol and duty, the militants who were originally on the second and third floors quickly began to gather in the open space on the first floor at this time.

All research operations on the first floor were ordered to stop by Brandon, and all the hunters in the experiments were put in cages, and these hunters didn't think about it at all, if they were released, they didn't care who you were, in their hearts, everyone was their enemy.

As if anticipating the battle that was about to take place, many of the hunters began to get excited, and with terrifying roars coming out of their mouths, they were desperate for someone to let them out and witness a world of blood and fire.

However, at this time, Brandon didn't want these things to play, in his plan, if they didn't hold the institute in the end, Brandon at that time would release all the hunters and let them attack the people who attacked the institute, and at that time it meant that Brandon would abandon the institute and retreat from the tunnel with key things.

In fact, only a minute or two has passed since the alarm sounded, and the whole research institute looks a little chaotic, but in fact, most of the people are busy with their own business. Although the attack on the research institute has never happened, it has been rehearsed several times in order to prevent such a thing from happening and what kind of problems will arise when the time comes. At that time, Ross hoped that the entire research institute would quickly enter a state of combat readiness after encountering such a thing, and then do everything possible to hold the research institute.

Soon, a dozen or twenty militants lined up in four rows and began to slowly approach the mountain gate, and the militant who walked first held a huge shield in his hand, including this militant, and seven or eight militants behind him all curled their bodies behind the shield, and then advanced at almost turtle speed. At this time, the mountain gate was still closed, they couldn't see what was going on outside, and they didn't know what was outside, and their task was to find out what was going on outside at this time.

Since the lights on the entire floor were not turned on at this time, the light on the first floor of the institute was a little dim, and the advancing militants could not even see what was under their feet, and all they could see was a long strip of light between the gaps between the two doors in front of them.

At this time, they suddenly smelled a mixture of kerosene and gasoline wafting around them, and some of the militants even smelled a faint smell of ale.

At first, they didn't pay much attention to these things, but as time went by, they suddenly felt as if there was something under their feet, and the combat boots under their feet made a crackling sound when they stepped on them, and the smell just now became heavier and heavier.

At this time, several militants who realized that something was wrong bent down and gently touched the ground with their hands, and they felt that there was an extra layer of something on the ground, and these things had a greasy feeling, and the smell was what they had just smelled, there was the smell of kerosene, there was also the smell of gasoline, and even the smell of ale!

At this time, the militants in charge of opening the gate didn't seem to realize this, and after vaguely seeing that everyone had arrived at the designated position, he began to slowly open the door of this electronic control!

As the light slowly increased, the sunlight slowly poured into the gray research room, and at this time, the more than twenty militants saw a familiar truck parked outside the slowly opening gate, and they also saw the broken boxes on the truck and the unidentified liquid dripping from it.

As the gate slowly opened, the light around the militants gradually brightened, although some of them had already guessed that they were stepping on a mixture of kerosene and gasoline. But what they didn't expect was that they were now surrounded by these mixtures! Moreover, the mixtures were still flowing slowly into the Institute!

"Retreat, retreat!" At this time, the militants, who had finally reacted, shouted loudly, their tone full of panic.

However, it is still a little too late to say that it is withdrawn at this time. After seeing the gate slowly open, the three action team members hiding behind the sandbags pulled open the ring of the grenade that they had been holding in their hands for a long time, and the two Underworld mercenaries each held a high-explosive grenade in their hands, while the flying knife held a flash shock grenade in their hands.

In a crisp sound, three grenades were thrown out in no particular order, and one of the grenades was dropped under the truck below by the mercenaries of the underworld! At this time, more than twenty people saw a black thing thrown under the truck they had just seen, and the other two black things were thrown in front of them, only one or two meters away from them!

"Boom!"

The first exploded grenade was none other than the one that was dropped under the truck, and in a roar, the whole truck shook violently, and the truck, which was already stained with kerosene and gasoline, was quickly engulfed in flames, and the fire began to spread rapidly in the direction of the flow of the mixture, faster and faster.

"Boom! boom!"

At this time, the grenades and flashing grenades thrown into the institute exploded just after they landed, and although the high-explosive grenades did not affect the militants, they successfully ignited the surrounding mixture. After the flash shock grenade thrown by the throwing knife exploded, all the militants who did not react suddenly fell into a white world, and there was even a trace of blood oozing out of their ears.

After the militants with tears on their faces reopened their eyes, although it was not a white scene, it was indeed a fiery scene! By the time the effect of the flashing bomb had passed, most of the militants had already been surrounded by raging fires, and even quite a few militants had already burned into flames, and several militants who were not very good even wanted to lie on the ground to extinguish the fires on their bodies, but the result was that they had become all burning people.

In less than a minute, the range from the mountain gate of the research institute to the research institute for tens of meters suddenly turned into a sea of fire, and more than a dozen militants who had not had time to run out kept screaming in the sea of fire, but now no one could save them. The militants who were lucky enough to run out looked at the fact that their companions, who were still acting with them just now, had turned into a burning man at this time, and at the same time there was a trace of sadness in their hearts, but they were more happy. If they hadn't reacted so quickly at that time, they would still be in the fire now, and their fate would be to be burned alive by the fire just like their partners in the fire.

"Da Da Da ......"

At this time, the sudden sound of gunfire suddenly woke up all the militants around, and the militants who were just about to pick up arms saw their captain Brandon holding an automatic rifle in his hand. I saw that the muzzle of this automatic rifle kept bursting with fire, and bullet casings with a trace of gunpowder smoke were thrown out of the automatic rifle's window shell, and Brandon's target was these militants who were still screaming in the fire!

These were all his subordinates, and when the explosion just began, when he saw the sudden flames, Brandon's heart was immediately shocked, and then he saw that more than a dozen of his subordinates who had not had time to run out were suddenly ablaze, and the screams resounded throughout the research institute. Brandon, who couldn't bear to see this scene, took up his weapon and gave these former men a happy death.

"Ding!"

When the last shell fell to the ground, there was no longer a single militant still standing in the fire, nor could the screams of the militants be heard. At this time, the alarm in the research institute has been turned off, and all the militants have arrived at the designated position, at this time the entire research institute seems to be extremely silent, everyone is stunned to look at the sea of fire not far away, even if they stand at such a distance, they can still feel the heat rushing to their faces.

"Everyone prepare to defend, reorganize the manpower, and take the mountain gate at all costs! I really can't do it, blow up those two anti-aircraft machine guns for me!" Brandon, who threw the automatic rifle in his hand to his men, shouted, "I have informed the chief, the troops to rescue us will arrive soon, and then it will be the time of death for those people!"

Since the distance from the mountain gate to the research institute was dozens of meters away, it was difficult to extinguish it in a short time, and the militants, who lacked fire extinguishing tools, could only watch the fire burn in front of them. And Brandon, who originally planned to retake the mountain gate, had to give up his plan at this time.

And he finally knew why the attackers of the institute did this, because he had just seen clearly the number of attackers defending the mountain gate, only three team members, and without this sea of fire, Brandon was fully confident that he would be able to control the mountain gate again in his own hands.

And with this sea of fire, Brandon can only arrange all the militants to a safe position, with the two anti-aircraft machine guns at the gate of the mountain and the condescending advantage, as long as it is within their line of sight, there is nothing that can be carried. And these two anti-aircraft machine guns are the only weapons in Brandon's hands that can deal with the attackers, although the institute is equipped with some anti-aircraft missiles, but if you want these things to work, you must have an airplane in the sky, and the high-power weapons that can suppress infantry fire are only these two anti-aircraft machine guns in addition to some rocket launchers, and at that time Brandon knew the importance of the mountain gate, so he arranged them all there, and now the mountain gate is lost, and the two anti-aircraft machine guns have all fallen into the hands of the opposite side. And the other party built a defensive position with sandbags in front of the anti-aircraft machine gun, and with the bazooka in Brandon's hand, it was impossible to threaten the anti-aircraft machine gun behind the cover!

Therefore, when he gave the order just now, Brandon said that if he could not control the mountain gate, he would have to destroy the two anti-aircraft machine guns in advance, even if it was at a huge cost. The 12.7mm anti-aircraft machine gun, even if all the hunters are sent out, in front of it, it can only be beaten to the fate of minced meat!

Of course, Brandon's thinking above is also based on the basis of attack, the two anti-aircraft machine guns installed at the mountain gate have a good range of fire on the outside, but on the inside there is only such a narrow range in front of them!

And Brandon wants to hold the institute, those attackers are bound to attack the institute, and at that time, Brandon only needs to send people to guard the position of the anti-aircraft machine gun in the dead end, as long as someone dares to rush into the institute, Brandon can also break them to pieces!

And looking at the burning speed of this sea of fire, it may be difficult for Brandon to regain control of the mountain gate in a short period of time, and Brandon found that there was a roaring truck at the mountain gate, and Brandon's face was a little ugly when he first saw this scene, from this point, it can be seen that the other party does not want to let himself and others rush out of the research institute, but wants them to perish with the research institute!

As the vice captain of the Ross Guard, Brandon certainly has his own arrogance, although he lost more than a dozen of his subordinates in the fire just now, but with the level of more than 500 militants in the institute, the loss of a dozen militants is not even a drizzle! And with these more than 500 people and hundreds of thoughtless hunters, Brandon has enough confidence to hold the entire institute.

Even if the opponent's strength is too strong, Brandon only needs to hold on for a few hours. Because as the leader of the Evil Wolf Mercenary Group, Rose will never let the research institute be attacked, and he will definitely send people to rescue them, and it will not be himself who will perish, but those who attack the research institute!

Due to this large sea of fire, Brandon also suspended the attack, and the flying knives and others, who only had three team members, would not be stupid enough to take the initiative to provoke the other party at this time, and with their current strength, it was already very small to be able to hold the mountain pass. Since the other side does not attack, he will stay here, as long as he waits for the Heavenly Wolf Jiang Tianyu to send someone, then it will be the time for himself and others to act!