In just a short period of time, under Sun Bin's unique design and effective supervision, looking at the majestic and magnificent Great Wall, at every distance, there was an improved version of the Yuanqi Cannon with a wide range.

At the same time, the Great Wall Guards started a new round of recruitment and military expansion. It is undeniable that Lord Gao Changgong's trip to Beijing this time really lived up to the expectations of the generals, not only replenishing a large amount of military supplies in a timely manner, but also bringing many policies to benefit the people by reducing taxes and exempting taxes.

On this day, as soon as the sky was bright, Captain Su Lie led a patrol guard team wrapped in silver armor and riding horses, and started the first patrol of the day. Looking at the familiar scene around him, it was no different from yesterday, with people entering and exiting the city gates, birds chirping in the branches, and dogs shuttling back and forth in the crowd, which was obviously a peaceful and calm picture.

"Boom, boom......" There was an inexplicable noise in the distance, like a giant hammer beating the earth. Relying on his past experience, Su Lie immediately took out his telescope and looked carefully at the place where the northern horizon disappeared. Su Lie was shocked by the situation in the distance, and couldn't help but let out an "ah".

The lieutenant next to him became suspicious and asked, "What's the matter, captain, what do you see?" ”

Su Lie was startled at first, then stabilized his breath and said calmly: "It's the demon clan, there are thousands of them, listen to the order, immediately light the beacon smoke, beat the war drums, order the whole army, and wait for the battle!" ”

It didn't take long for all the Great Wall guards to assemble on the Great Wall, at various checkpoints and fortresses, waiting for the big attack of the demons at any time.

However, to their surprise, the demons took a position a thousand meters away from the Great Wall and stopped advancing, which happened to be the limit of the range of the Yuan Qi Cannon.

Su Lie began to fall into doubt, the demons had come to attack before, and they had all charged into battle without any scruples, how could they suddenly learn to camp this time, and they were still outside the range of the Yuan Qi Cannon.

Su Lie couldn't think through these questions in a short period of time, and all he could do now was to wait, waiting for the next move of the demon clan.

One hour, two hours...... Three hours passed, and the demons still didn't make any next moves.

In fact, what the Great Wall Guards didn't know was that this was just a feint attack on the Great Wall, and the other demon army had already advanced rapidly towards the Western Desert, preparing to raid the Tang army that drove the Western Regions halfway.

The Great Wall Guards were in this inexplicable confrontation that lasted for two days and two nights. On the third day, while waiting passively, Su Lie received urgent information from the patrol agent of the Western Regions, saying: "A large number of signs of activity of the demon army have been found, which may threaten the safety of the Tang Dynasty demon army, please send the army to chase after it!" ”

After Su Lie read the letter, he couldn't help but break out in a cold sweat, it turned out that the current demon army was just covering the traces of another army, if he didn't send troops to chase down another demon army in time, the Datang Demon Army was very likely to encounter great danger.

couldn't help but think about it, Su Lie rushed to Lord Gao Changgong's camp non-stop, and discussed the matter with him carefully, studying a feasible and effective solution at the moment.

After a short period of discussion, the decision to focus on the main attack was finally made. With one army taking the initiative to attack, the demons who set up camp on the northern front, with another army out of the city gate to the west to pursue another demon army deep into the Western Regions, the rest of the guards continue to defend every important place of the Great Wall.

The gates were wide open, the drums of war were beating, the flags were flying, and the orderly columns of troops drove out of the city. The army that took the lead out of the city immediately launched an attack on the demons in the north. The other army, out of the city, went straight down the city walls and moved westward.

The Demon Front not far away captured every move of the defenders of the Great Wall, and also drew an army out of it to block the guards moving westward.

Su Lie was guarding the city wall, and he also observed the actions of the demons, he didn't expect that the demons' reactions would be so shrewd and fast. Su Lie suddenly observed that just behind the Demon Front, a large area of black suppressed and winged demons inexplicably rose into the air, carrying huge black stones under them, and galloped towards the city wall, "Not good, they are here to destroy the Yuan Qi Cannon." Su Lie was shocked.

"Everyone, shoot arrows at the demons in the air!" Su Lie roared. In an instant, the arrow clusters fell like rain, and the body of the demon clan in the air was stained with large and small arrow clusters in the blink of an eye. Because the skin of the demons is as thick as armor, very few of them are shot down.

However, when the demons in the air got closer, they reached within the range of the Yuan Qi Cannon. A white beam of light shot out from the Yuan Qi cannon in an instant, shining and ghostly like a white horse passing through a gap, and in an instant, many demons were shot down, due to the extremely large number of demons in the air, limited by the attack frequency of the Yuan Qi cannon, at least one-third of the air demons still arrived above the Great Wall.

The demons in the air lifted the black Hearthstone and smashed it into the Yuan Qi Cannon, and the black Hearthstone used its own gravity and the hard momentum given by the demons, a Hearthstone could easily smash the Yuan Qi Cannon.

It didn't take long for the Yuan Qi cannon on the frontal battlefield to be almost completely damaged.

The Great Wall Guards could never have imagined that the demons had developed a trap wing, and their vitality cannon had been smashed to pieces before it could fully play its due role.

When Su Lie saw the battle situation in front of him, he immediately ordered to shoot spears, and then a long and heavy spear and bow shot out, almost shooting the remaining air demons down.

On the ground, two demon armies, and two guard armies, have also been fighting, due to the large size and strength of the demons, several human soldiers must join forces in order to kill it.

The picture of bloody slaughter on the battlefield is rendered at the foot of the Great Wall. The roars, the sound of soldiers, and the sound of tragic deaths were intertwined and echoed in the vast weeds.

Due to the army moving westward, it was stubbornly obstructed by the demons, and if it continued, it would only increase greater casualties, and in desperation, Su Lie had no choice but to withdraw his troops, and the demons who came to pursue were blocked by the huge spears and bows shot down from the city wall, and the demons finally retreated.

Under the limited force, and at the same time lost the protection of the Yuan Qi cannon, in order to defend the consolidation of the Great Wall, in case the demons launched a larger-scale attack again, Gao Changgong and Su Lie finally agreed to take the initiative to attack, in order to actively defend, and at the same time gave up the plan to pursue another demon army in the Western Regions.

Next, the demons did not launch any attack, only gathered the remnants and continued to camp at the original front.