The siege of Tongguan continued, and after the first line of the upper south gate was started, the Jingbei army began to shell the city wall at the south water gate of the main pass of Tongguan and the lower south gate of the first line of Phoenix Mountain, in order to cope with the offensive of the Jingbei army in the direction of the upper south gate, in order to confuse Sun Chuanting and Zhu Shouqian, so that the defenders of Tongguan mistakenly thought that the main target of the Jingbei army's main attack was the upper south gate.

At the same time, Li Laiheng's department at the west gate of Tongguan also began to attack Tongguan, and for a time the whole Tongguan was on both sides, the sound of cannons and guns became one, and there were flying cannons everywhere and the shouts and roars of soldiers on both sides of the enemy and us, and the entire Tongguan city wall was in an emergency.

During the artillery bombardment, the second town that attacked the south water gate of Tongguan also began to be launched, but Wang Zhong did not choose to attack, but ordered the people who accompanied the army to take the way of earthwork to dig into the Tongguan city wall.

The heavy rain for seven consecutive days made the ground around Tongguan muddy and soft, and digging a trench was obviously not a difficult task.

More than 3,000 people were divided into more than 20 units, and they began to dig under the noses of the Tongguan defenders.

As the tunnel lengthened, more and more people entered the trench, and then desperately shoveled the earthwork out of the trench.

"Sun Buyuan, the thieves are attacking from several sides, why are they digging a trench in the front, is it possible that they plan to trap us to death."

Zhu Shouqian is a civil official in the end, and he doesn't know anything about the art of war, and in his cognition, the siege is the siege method of ants and the locking method of encircling the city on all sides.

"This ...... No, they want to use earthwork to transport soldiers under our walls. ”

As soon as Sun Chuanting was about to speak, he suddenly found that the trenches of the Jingbei Army were being dug in the direction of Tongguan at a speed visible to the naked eye, and more than 20 trenches were slowly extending like spider webs.

"Stop them, fire, fire at the headquarters."

Sun Chuanting was shocked, he had been in the military for a long time, so he naturally knew the consequences of the enemy's long-range soldiers approaching the city, and he didn't care about exposing the artillery position, so he resolutely issued a military order to attack.

"Boom, boom......!"

After more than ten cannon shots, Sun Chuanting tried his best to look in the direction of the shelling, but the speed of the Shandong army's digging trenches did not seem to slow down at all, and in just about a pillar of incense, the ditch under the city advanced about three zhang.

"Boom, boom......!"

As soon as the Qin army's cannon rang out, the Hongyi cannons of the Jingbei Army also fired, and their target was the Qin army's artillery position on the city wall.

"Bang Bang ......!"

A loud bang came, and a cannon hit a general cannon of the Qin army, and the huge impact force smashed the barrel weighing more than 1,000 catties off the fort, and the barrel smashed on the city wall with a "boom", and then bounced up again, and the two Qin soldiers who had no time to dodge were swept away by the barrel and were crushed into meatloaf.

"Don't fire, don't fire...... Quickly transfer gun emplacements...... Wait a minute. ”

Sun Chuanting's face turned pale, he had already seen that the purpose of the trench was to cover the enemy, and the cannonballs could not hit, and it was also impossible for the firecrackers and archers on the side to shoot the guns and arrows into the ditch.

In the direction of the south gate, Dang Shousu and Liu Fangliang fought a real fire, in order to cover the headquarters army Ma Dengcheng, Dang Shousu brazenly ordered, and all the small artillery was pushed to the front line.

In addition to the Hongyi cannons used in a concentrated manner, 200 large and small artillery pieces were allocated to each of the 10 newly organized independent towns, that is to say, there were 400 artillery pieces in the hands of Dang Shousu and Liu Fangliang.

It is true that the Qin army's artillery has a condescending advantage, but the Qin army's artillery positions have been destroyed by the Hongyi cannon, which is less than half, so in terms of quantity, the artillery advantage of the Jingbei army has reached an eight-to-one advantage, even if the artillery is blown up by the Qin army in the process of advancing more than 20 guns, but Dang Shousu doesn't care at all, he just needs to go to the south gate.

"Boom, boom, boom......!"

At the moment when the small cannon reached the firing range, all the gunners of the Jingbei Army couldn't help but breathe a sigh of relief, and then swung the cannon in their hands heavily, igniting the fire rope on the barrel.

"Boom, boom, boom......!"

Three hundred and sixty or seventy pieces of artillery opened fire almost simultaneously, and the huge roar made the entire Tongguan City tremble.

One after another, the cannons rained down on the city wall of the southern line of Tongguan, and the smoke billowed from the city wall, and the dense artillery not only took the lives of hundreds of Qin soldiers but also blew up twenty or thirty Qin artillery.

"Keep the shelling, and the next one will be attacked by Ben."

Liu Fangliang ordered again, three hours have passed since the beginning of the war, and he doesn't want to fight until dark and not attract Sun Chuanting's mobile troops.

In fact, Li Jizu's troops of the Qin army at the upper south gate were about to be unable to hold on, especially after the Jingbei army under the city put all the artillery into the battlefield, the defenders of the already side had been firmly suppressed behind the city wall, aimlessly throwing the rolling logs and stones next to the wall battlements, and could not raise their heads at all.

"Li Shuai, it's not a way to go on like this, our army has been fighting so far, more than half of the soldiers have been killed or wounded, and now not only the artillery of the opposing army can't move, but their archers and musketeers are also in a good position under the city, let's ask Sun Buyuan to send troops for reinforcements!"

The guerrilla Wang Lung of the Qin army peeked down from the battlement, and saw another Shandong army carrying a cloud ladder, pushing a shield cart and a rushing cart in the direction of the city wall, and couldn't help but look at Li Jizu in front of him.

"Damn, where did Shandong Jun get so many cannons from the dog's day, Just listening to the sound of the city, the number of artillery on the opposite side exceeds the sum of our Qin army, how can this battle be fought? You go and ask Sun Buyuan for troops. ”

Li Jizu is also depressed, it is really more popular than people, everyone is nominally the army of the Ming Dynasty, but how can this equipment be so different.

"Sun Buyuan, since the beginning of today's siege, the rebel army has organized a total of 2,000 siege battles four times, and now a large number of artillery has been launched, our army is really unsustainable, and please send reinforcements to Sun Buyuan quickly, otherwise the south gate will not be protected today."

Just when Sun Chuanting was thinking hard about how to deal with the strategy of the Jingbei army's excavation and advancement, the Qin army's guerrilla Wang Long, who was guarding the direction of Shangnanguan, ran to the gate tower of Nanshui Gate out of breath.

"Sun Buyuan...... Simon is in a hurry! ”

"Sun Buyuan...... The rebel army set up the artillery on Phoenix Mountain, and the lower South Pass was completely covered by their artillery. ”

At the same time, the defenders of several other places came to the gate tower of the main city of Nanshuiguan almost in no particular order.

"This ...... He Renlong, you send 3,000 troops to reinforce the south gate and the west gate, and be sure to block the rebel army to the headquarters. ”

Sun Chuanting finally changed color, he didn't expect that the Jingbei Army would be so fierce, and he would not feint, but would directly attack from all sides, so that all the gates were in a hurry.

"Eun ......!"

He Renlong was shocked in his heart, and glanced at Sun Chuanting hesitantly, because his department was a defeated army, Sun Chuanting was afraid of disturbing the army's heart, and he had stayed in the main pass to standby, in front of Sun Chuanting, he did not dare to launch a mutiny, and now the military horses were put at the west gate and the south gate, and the opportunity to welcome the official army into the city came, but once he opened the city, he was afraid that his favor would not be able to live, how good is this.