Holding the tactical flashlights in their hands, these Marine Corps members moved forward slowly along both sides of the rock wall.
At the same time, they also turned on the astigmatism of the tactical flashlights, completely illuminating the interior of the dim cave in front of them. .
And after they had just experienced the narrow tunnel, they couldn't help but widen their eyes when looking at the huge and vast space in front of them, and their breathing became a little faster.
Although the huge space is dim, it can still be seen clearly.
Dense stalactites hang upside down from a height of more than five meters, and there are also some broken stalactites on the uneven ground.
However, the interior of the space is not humid.
On the contrary, it appears to be quite dry on some rock walls.
It seems unrealistic to call this place a basketball court, because even three basketball courts arranged in this space are nothing more than this.
"Wait, why is there still a smell?"
A member of the Marine Corps frowned in confusion, subconsciously scanning the space in front of him with a tactical flashlight, and couldn't help but sniff it slightly.
He looked at the layer of gray-brown soil under his feet that covered the ground, but he was directed towards it.
He spat hard at the side and said helplessly: "Damn, there's still a pile of bat guano here."
Liszt also used a tactical flashlight to shine over it.
The ground was covered with gray-brown soil.
He moved his nostrils slightly, and a strong rancid smell suddenly appeared in his nasal cavity, and even went straight to his brain nerves along his organs.
He also spat to the side and nodded with a headache: "It seems that if we don't clean up these bat droppings, we won't be able to station here."
Those gray-brown soil layers were undoubtedly bat guano, even in Lister's memory.
These things seem to be traditional Chinese medicine.
Now it's just a pile of rubbish.
Of course Liszt was not very impressed either.
What kind of diseases can be treated with this thing, but with the rancid smell, it is estimated that not many people dare to try to use these things to treat diseases.
Exhaling slowly, Karl couldn't help pinching his nose to let the sour smell gradually calm down.
He turned his head and looked at the rock wall in the cave, frowning slightly.
He used the light beam to sweep the surrounding rock formations.
He couldn't help but nodded and said: "These bat guano must be cleaned up.
Otherwise, it will pollute our living area."
After a pause, he still frowned and said: "The air circulation is poor, we also need a vent."
"The tunnel behind us won't be the only vent."
Liszt frowned slightly, and the rancid smell in his breath meant that there were a lot of bat guano in the cave, but it also showed that the ventilation conditions in the cave had deteriorated.
Scanning the surrounding rock walls with the tactical flashlight in his hand, Lister gestured to the Marines behind him and said in a deep voice: "Look, maybe there are other tunnels inside."
Any underground fortification.
The requirements for vents are extremely stringent.
After all, oxygen is the most critical item for human survival.
If there is no oxygen flowing through the wind, we will not survive.
Then the carbon dioxide deposited in the fortification will make people feel depressed, and even feel suffocated due to the high concentration of carbon dioxide.
Let alone work or fight, even survival will be a problem.
Especially among modern combat methods, poison gas bombs are an option.
Once Liszt's enemies frantically use poison gas bombs against them, in this cave with extremely poor circulation, the power will be almost 100% explosive.
And think about what the United States did in Vietnam and the Soviet Union in Afghanistan in the previous life.
They used poison gas bombs without any scruples.
Not to mention that this has been going on for more than two hundred years.
The two major military groups have already gone crazy.
"Understood, such a large cave will definitely not have only one tunnel."
Karl nodded and immediately made a tactical gesture to the soldiers behind him.
They immediately picked up their weapons and walked quickly towards the interior of the cave ahead.
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At the same time, they scanned the surrounding rock walls very carefully, using tactical flashlights even under their feet and above their heads, and they followed Lister's orders very seriously.
And they didn't scatter aimlessly, they all formed groups of two, and these Marines were able to get help from the other two groups around them in the shortest possible time.
This was their instinctive reaction formed after a long period of military training, but in Liszt's eyes, he couldn't help but nodded, raised the corners of his mouth and sighed slightly: "These guys, if they are tested on the battlefield, So compared to those ordinary infantrymen in Anchorage, it is not too much."
According to Lister's understanding, the U.S. federal infantry on the Anchorage line of defense is also composed of elites as the mainstay, stationed at various key points, and mainly rear reserves.
Those unimportant areas, or subsequent waves of large-scale operations, were all supplemented by recruits who had been trained for several months, and were abruptly filled in Anchorage's defense line.
After all, the U.S.
Federation is now fighting on two fronts.
The security war in Mexico is still going on, and the situation in Alaska has deteriorated so much.
Apart from the temporary large-scale recruitment of domestic veterans and young people who meet the standards for joining the army, there is almost nothing good.
A way to face the fact that Anchorage's defense is huge and short of personnel.
After all, training in the defensive area near the front line will progress much faster than the strict military training in the rear.
But the members of this group of marines are themselves elite troops in the previous game that were part of the navy for landing operations or island operations.
Although their weapons and equipment may not be as good as those of the orthodox U.S.
Army, their tenacious fighting style and strong morale have already been demonstrated in the Pacific islands of World War II, the rainforests of Vietnam, and the deserts of Iraq. , they are elites who are beyond ordinary troops.
"Captain Lister, we found a tunnel, and it seems that the wind is blowing again."
Just inside the cave on the left, two young Marines who were carrying weapons and tactical flashlights were somewhat surprised to discover that on the rock wall in front of them, in the area covered by bat guano, there was a small hole about half a meter tall.
The rock cracks on the left and right were cracking there.
When they walked over, they could even feel the slight wind blowing on their faces, bringing up the rancid smell of bat guano, which made them even more uncomfortable.
They covered their noses, but turned to face Li Si.
Te waved and said: "This should be a vent leading to the outside world":