The entire Twin Peaks had become a chaotic jumble, with bullets and bombshells flying everywhere.
Artillery units from Japan, located in the distance, had trouble hitting their targets.
The machine guns and cannons from Jieke Group were deeply buried within concave trenches, and their howitzers had difficulty hitting those hiding in the recesses due to the high angle of fire.
They could only bombard the upper layers of the mountain at random, unable to effectively kill Jieke Group soldiers hidden deep in the trenches.
At the waist of the Twin Peaks, which had been bombarded for the past week, the exposed bare rock wall was filled with a dense array of hidden fire points.
Jieke Security Soldiers opened the shooting windows, lifted the camouflaged rocks and scorched earth on the outside, and extended their deadly machine guns out of the windows to inflict heavy casualties on the ascending Japanese Soldiers.
Farthert away, armored vehicles and tanks tried to come up, but the mountain paths were not easily traversable by these steel beasts, which could only withstand Jieke Group's heavy bombardment on one hand and support the mountain with various machine guns and cannons on the other.
Unfortunately, these cumbersome behemoths did not escape the punishment from Jieke Group.
Various anti-tank missiles flew down from the mountain, and the steel behemoths struggling to move on the mountain paths were like prey pierced by hunter's spears, with many being destroyed on the path, further blocking the passage of vehicles behind them.
Only infantry could execute flexible operations on the Twin Peaks, but all infantry were pinned down on the mountain, unable to raise their heads to counterattack.
For a time, under machine-gun fire and attacks from a variety of light and heavy weapons, the scene was littered with corpses.
Countless Japanese Soldiers and Chan Country Government Army troops could only hide in shell holes, under slopes, and behind rocks, shivering with fear.
Even so, they still faced covert assassinations by Jieke Group Super Soldiers and precise bombardment by heavy artillery, unable to organize an effective counterattack. Coming out into open sight only led to a quicker death.
"What's going on, why didn't we realize that all Jieke Group soldiers were hiding underground?"
Commander Saito Fumihiko, who directed this joint force to attack Twin Peaks, was furious as he watched his soldiers being slaughtered en masse, his heart bleeding.
"Preliminary intelligence didn't detect it; the enemy built a complicated network of tunnels inside the Twin Peaks. How did they manage to complete such a project in such a short period, and our massive bombardment failed to reveal it."
The military staff by his side held binoculars, his face extremely grave.
They had underestimated Jieke Group's stubborn resistance, having originally thought Jieke Group would abandon Twin Peaks.
Before ascending Twin Peaks, they had used drones, satellites, high-altitude reconnaissance aircraft, and even infrared thermal imagers, all which indicated that there was no life left on Twin Peaks and that the entire mountain was bombed into burnt land.
This military staff couldn't figure it out; in reality, Thousand-Handed Centipede had worked diligently on Twin Peaks, digging out various tunnels and making targeted camouflage on the outside.
At the same time, the soldiers were wearing Tianyuan Protective Clothing; when infrared thermal imagers detected the Tianyuan Protective Clothing, it would be isolated by the clothing, ensuring that not a bit of human body heat would leak out.
"Call for air support; change ammunition at the rear airfields, bring in drilling bombs and Thermo-baric Bombs."
Saito Fumihiko issued orders, watching the infantry trapped on Twin Peaks with nowhere to go, seeking air support to break through the stalemate.
The speed of the fighter jets was fast, and with jets already on standby in the sky, after the infantry burst out their coordinates, guided bombs were used for precise bombing.
Amidst the whistling of the jets, from the belly and the wings, little black dots fell down, landing on Twin Peaks.
In an instant, soil and rocks flew chaotically on Twin Peaks; guided bombs blew deep craters, but were unable to pose a real threat to the deep tunnels.
After the explosion's tremors and ringing in the ears had faded, gunfire pierced through the gunsmoke to rise again.
However, when the aircraft carrying Thermo-baric Bombs and heavy drilling bombs arrived over Twin Peaks from the rear airfield, the situation finally changed.
A Thermo-baric Bomb dropped from the sky into the tunnels, and upon explosion, burst like a magnificent firework, instantly releasing a massive amount of heat, forming a high-temperature, high-pressure fireball, with a center temperature exceeding two thousand degrees.
Jieke Security Soldiers inside the tunnels were directly torn apart by the impact of the Thermo-baric Bomb, and the expanding fireball continued to rush deep into Twin Peaks through the tunnels.
"Close the fire valves."
The Commander yelled, as a Super Soldier rushed forward, pulled down the protective cap of a valve, and the fire valve closed swiftly.
The fireball accompanied by the overpressure hit the fire valve, causing it to shake violently. Fortunately, it was robust enough, and the soldiers inside finally breathed a sigh of relief, watching with lingering fear the destruction caused by the Thermo-baric Bomb.
The Thermo-baric Bomb's lethality was 100% higher in enclosed spaces like rooms, underground caverns, and rock caves than in open spaces, especially against soft targets.
Many soldiers in the tunnels, even if they escaped the flames and shockwave, would suffer burns to their respiratory tracts, resulting in combat casualties.
Besides Thermo-baric Bombs, heavy drilling bombs were also falling.
The drilling bombs were like huge nails, penetrating straight through thick layers of earth. After a delay of several seconds, one could see the nearby ground suddenly shake, and from the exposed shooting windows and ventilation channels, thick clouds of dust were ejected.
At the location where the drilling bombs fell, hundreds of tons of mud and rocks were lifted, forming a towering column of mud tens of meters high, a sight to behold.