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More than 100 gunboats of the little devils roared in unison, and the shells whistled by, bursting in a series of explosions on the position, setting off a wave of sand.

The devil's artillery fire was fierce, but the blind counterattack was huge, exploding on various mountain bags, earth-shattering, but it had no effect.

The position was set up in the middle of Shuangshansha Island, and the devil gunboats could not observe it on the river road, and only bombarded indiscriminately according to the coordinates of the map.

On the contrary, the fortress is located high, overlooking the river, and all the monitoring holes are all unfolded, and they know every move of the devil gunboat well, and then transmit it to the position with lantern language.

There was no trace on the position, leaving only the secret sentry and the observer to transmit information and timely feedback to the five artillery positions.

Five mountain passes, with 10 mortars as units, are hidden in the shadows, and long-range artillery fire is almost impossible to reach, and they are all blocked by mountain packs.

It is known that gunboats launch shells that fly in an oblique arc with a long range and a gentle flight trajectory, similar to the flight trajectory of a gunball.

Therefore, the low-lying places in the mountains were inaccessible by the bombardment of the devil gunboats, and the shells exploded on all the hills.

The mortar shells have a hanging flight trajectory with a large arc, which is convenient for destroying targets at close range, and the firing range is far less than that of gunboats, but it is not a problem to deter a two-thousand-meter devil gunboat.

It was precisely because the little devils were unable to carry out heavy artillery bombardment of the position from a long distance that they sent gunboats to attack and detoured to both sides of the river to carry out artillery bombardment.

However, Yang Guan had already taken precautions, and for the sake of safety, the mortar position was set up in a low-lying place, which could not only conceal the attack on the little devils, but also give full play to the performance of the mortar.

As a result, the advance team launched an artillery bombardment in an unharmed posture, launched rapid fire on the devil gunboats, and sank 34 devil gunboats in five rounds.

The devil gunboat quickly retreated, retreated to a distance of three thousand meters and launched an artillery bombardment, stuck in a position that the mortars could not reach.

As a result, the position fell into a state of fluctuation, and the entire area was immersed in the smoke of artillery fire, subjected to endless shocks.

At this time, the advance team members shouted loudly: "Report to the instructor, the little devil has infiltrated the position and is close to within 500 meters."

Yang Guan sat in the dark castle and pondered, and after hearing the report, he said: "Don't pay attention to it, let the little devils come in, and destroy them within two hundred meters."

The team responded with a "yes" and quickly conveyed the order, and a small number of snipers went into alert.

Monk Wei was very jealous of this group of devil snipers, and said suggestively: "Instructor, these little devils have very high marksmanship, and if they are put in, they will cause casualties to the troops, and they will be destroyed with artillery fire, right?"

Yang Guan shook his head and nodded: "The little devil wishes that the mortar would expose the target, and the devil touches it to reconnoiter the firepower point, and it is safer to put it in and annihilate them one by one."

The devil snipers are all capable, reconnoitring positions along the road, removing mines, screening false targets preset by Yang Guan, and giving back information in a timely manner, causing the devil gunboats to correct their shelling positions.

Yang Guan did not launch a long-distance sniper, in order to consume the little devil's artillery fire, until the devil's artillery fire extended to the trench position, and the little devil had entered within two hundred meters at this time.

Due to the fierce artillery fire of the devils, Yang Guan ordered the team members to stay still and hide and stand by.

The tactical trenches on the positions were constructed according to the pattern of the Boundary River defense line, and then the Devil Army clothing was mounded with mounds.

The location is neither high nor low, just two hundred meters in front of the deterrence, and it cannot be detected from a distance.

The little devil sneaked into 200 meters, and the first-line position was completely exposed, causing the devil's artillery fire to start a round bombardment.

Countless shells burst on the sandbags, blowing up countless craters, which continued to unfold, and the destruction became more and more serious.

The devil sniper hid at a position of one hundred and fifty meters, stagnating, not daring to cross the gentle area.

Yang Guan led his troops to hide, leisurely hiding in the air-raid shelter, talking to each other about the devil's artillery fire, that shot was crooked, this shot was a waste.

In the case that the little devils did not have infantry to attack, everyone bathed in the devil's artillery fire and rested in the sand waves and the roar of artillery fire.

Yang Guan's tactical policy is very clear, aiming to consume the little devils, and building a trench is just a bait to fight a protracted war.

Therefore, everyone was leisurely and began to discuss with each other, discussing the inaccuracy of the devil's artillery fire, and at the same time discussing ways to straighten out the trenches.

As a result, the devil's artillery fire lasted for half a day, causing the trench to be devastated and the smoke of gunpowder continued to fill, but there was no trace.

At this time, the devil's artillery fire extended forward, delivering a devastating blow to the area behind the trench, at the expense of consumption.

The devil sniper approached quietly, probably thinking that the trench was just a cover, and he was blown up and there was no trace of people, so he approached with confidence.

Yang Guan observed from the surveillance hole, and when the little devil entered the hundred meters, he ordered loudly: "Prepare, give me a fight!"

The order was given, and the snipers of the advance team moved violently, collectively poked out their guns, and sniped a hundred little devils.

The little devil was caught off guard, and more than 70 people were killed by a round of bullets, and a second round of sniper bullets was ushered in before a counterattack was organized.

There was no suspense in this battle, the little devils were completely annihilated, and the elite soldiers could not stop the dense bullets.

After winning the battle, Yang Guan ordered loudly: "Build trenches collectively, build a stronger one, and prepare for more ferocious artillery fire."

Xu Cai shouted: "The young master is too cunning, induce the little devils to enter the trap, these little devils are dead, and the trenches will be safe!"

Yang Guan glanced at him and corrected: "The little devils are smarter than you, this is a group of elite little devils, but they are not all devil snipers, they are watching from the periphery!"

The words were amazing, and before Xu Cai could refute the exit, the devil's artillery fire came again, blowing up a sand tide.

The devils bombarded with artillery fire, and it was not until dark that the toner cartridges were withdrawn, ending the battle.

On the second day, the devil gunboats came again, increasing their size, and the number of gunboats reached 230, and they still carried out round bombing of tactical trenches.

At the same time, the elite troops of the little devils infiltrated the positions and guided the artillery coordinates for the devil gunboats.

Yang Guan ordered the snipers of the advance team to wait for the opportunity to snipe, and ordered the troops to sew small sandbags with devils' clothes, and the devils bombarded with artillery fire, and the small sandbags filled the pits.

As a result, the bunker at the front of the trench was unharmed, and the devils blew up a pit, and the advance team immediately filled it.

And there is no threat for the devil shells to fall into the bottom of the trench at a depth of ten meters.

Yang Guan's continuous war of attrition was achieved in order to stimulate the nerves of the devil's high-level and induce a decisive battle.

On the third day, the little devils attacked on two fronts, and the devil's gunboats continued to bomb the position, and at the same time launched an artillery bombardment on Qi Zhenbang's department.

The little devil's intention was obvious, trying to destroy Qi Zhenbang's department, and then set up an artillery position on land, and then destroy the location of Yang Pass with artillery fire.

After all, the shelling also needs an angle, and under the premise that the fortress peak is blocked in front of the position, the little devil is at a loss for the position.

Unable to destroy the position, the nail of Shuangshan Sand directly deterred Jiangdao and blocked the strategic passage of the little devils.

The tide of battle is changing rapidly, and the decisive battle is quietly approaching.