If the power of gunpowder can be increased several times, then if nothing else, by dismantling thirteen five-pound gunpowder packets, more than sixty one-pound small thunderbolts weighing one pound can be made.

The technology for extracting copper oxide is not complicated, but it is impossible to get it done in a short time.

Li Rui gritted his teeth, spent 10,000 reputation points again, exchanged a pound of copper oxide powder directly from the system, and then asked the young men to open the thirteen gunpowder packets, pour them into them proportionally, and stir them evenly with wooden sticks to make a small thunderbolt weighing one catty!

"Remember, you have to work in pairs to use thunderbolts, one person ignites and one throws, if the thrower is shot by a Tartar bow and arrow, causing the bolt to fall on the fort wall, the igniter must quickly pick up the bolt and throw it out of the wall, otherwise it will be us who blow it up."

Li Rui distributed the small thunderbolt bombs he had made to the ten groups of auxiliary soldiers, and said in a solemn voice.

……

……

"Woo Woo Toot Too~!"

Just after morning, the Tartar camp sounded the horn of attack again, and the remaining 170 or so Tartar soldiers, each of about 10 men, slowly approached the fort wall with wooden poles made of rough logs as cover.

The wooden escape may be bulky, but it is effective in defending against bullets, and in this attack, only a very small number of Tartar soldiers rode horses, and the gap between the wooden and wooden trees was also very large, forming a small skirmish.

In this way, not only can the salvo not exert its due power, but also the thunderbolt thrown in the fort will not cause a large number of casualties, all of which are the experience summed up by the Tartars who have been fighting with the Ming army for many years!

The Tartar soon approached within 100 meters of the fort wall, and under the cover of Mu Dun, he frantically poured arrows on the fort wall, as if to vent his frustration of trying to shoot people last night and not being able to find anyone.

For the first time, the young farmers experienced the power of the Tartar bow and arrow, and they were almost suppressed and did not dare to raise their heads, and those who could make the bow were especially taken care of, even if there were companions who raised their shields to cover, and from time to time someone fell from the arrow!

As for those dense pit traps, after all, they are not as effective as deep trenches, and they can only make the Tartars suffer a loss without realizing it, and they will be exposed with a pull of their feet.

"Bird Gunner, salvo~!"

"Bang ......"

When the distance between the two sides was reduced to within fifty meters, all the birds on the fort wall began to shoot, and the wooden debris in the hands of the Tartars flew sideways, and the damage was limited.

Only Li Rui's pistol, as well as Xue Rengui's archery skills, with their super high accuracy, can effectively kill the Tartars!

"Choke, kill all the Han dogs~!"

Aobai, who was hiding behind Mu Dun, drew his scimitar and roared to give orders.

As the order was given, all the Tartars holding the wooden escape, no longer covering the archers behind them, rushed to the bottom of the fortress wall, held the scimitar in their mouths, and threw the hook lock upward.

The young men who had been prepared for the fort were not decorations, and immediately braved the rain of arrows, threw bricks and stones downward, and lit the small thunderbolts of the medicine twist.

Screams, explosions, filled the fortress walls above and below, and the battle heated almost instantly!

"Stop fighting, go to guard the cave of the fort gate, bang ......"

Li Rui found a few Tartar soldiers, rushed to the dilapidated fort gate with a wooden escape, and hurriedly shot while directing the bird gunners to remove the fort wall.

"Dog's Tartar, let Li Rui throw a thunderbolt to kill them."

"You want to blow up the fort gate, throw it to the side!"

Some young people were in a hurry, and they rushed over and were about to throw a small thunderbolt in front of the fort gate, but fortunately, Li Rui was quick and hurriedly snatched the thunderbolt that had been lit and threw it next to the fort gate.

Gunpowder with copper oxide is enough to blow up a small truck, and the gate of the fortress is already dilapidated, although it has been repaired with wooden planks, but if you throw one in front of the door, it will definitely be blown up!

A few Tartar soldiers who rushed to the fort gate seemed to have calculated this point, seeing that a thunderbolt fell on the side, and even some Tartar soldiers went to pick it up regardless of life and death, and actually wanted to blow up the fort gate with a thunderbolt.

"Boom~!"

The twists of the thunderbolt burned out and exploded, and the Tartars who went to pick it up were blown to pieces.

The remaining Tartar soldiers used Mu Dun to block the sputtered broken porcelain pieces and rotten iron nails, and then held Mu Dun to withstand the bullets shot by Li Rui above their heads, and the bricks and stones thrown by the young men, grabbed the gap in the fort gate with their hooks, and struggled to throw the rope to several cavalrymen in the distance, but they wanted to forcibly drag the fort gate open!

"Tartars are in the fort~!"

At the same time, a panicked shout suddenly sounded on the fort wall not far away, Li Rui turned his head to look over, and just saw a Tartar soldier, under the cover of feathered arrows outside the fort, climbing up the fort wall with a scimitar in his mouth.

Although the young men have good thunderbolts, the Tartars line up the skirmishers, so that the thunderbolts cannot form a large number of damage, and almost everywhere there are Tartars climbing the wall along the hook lock, coupled with the crazy archery cover of the Tartars outside the fort, it is also expected to climb the fort wall!

And with the first, there was the second, and almost at the same time six or seven Tartar soldiers climbed the fortress wall.

"Brothers who are trapped in the camp, drive the Tartars off the fortress wall~!"

Xue Rengui shot an arrow over a Tartar soldier closest to him and shouted.

The fifty young men he had personally selected and scattered all over the fort walls in groups of five had finally come in handy at this time.

These young men are equipped with almost all the armor in the fort, including fifty pairs of chain mail left by Liu Zhenhai's team, as well as cotton armor, leather armor, and iron armor that captured the Tartar soldiers.

Some Tartar soldiers fought with great strength, and found that these people did not dodge or dodge in the face of the scimitars that had been cut down, but only returned with the weapons in their hands, and they responded to him with five weapons of different lengths, which slashed and stabbed from all angles.

This made a thought involuntarily pop up in the mind of the Tartar soldiers: The Han dog also has a red-armored baya?

Yes, Red Armor!

The main force of the Manchu Tartars in close combat was usually red-armored soldiers, wearing three layers of heavy armor to charge into battle, swords and guns were difficult to hurt, and they were not afraid of death.

It's just that some of their red-armored soldiers were buried by Zhuo Butai, and the rest followed Ao Bai to climb the wall last night, and Li Rui was left under the fort wall with a five-pound gunpowder bag, and none of them escaped back!

"Puff~!"

This Tartar soldier already had fear in his heart, but the honest and young men who were carefully selected by Xue Rengui did not have as many thoughts as him, and several weapons slashed into his body at the same time, almost splitting his body instantly.

Similar battles occurred all over the fort wall, six Tartars who climbed the fort wall, four were killed on the spot, and the remaining two, one was still struggling to dodge left and right, and the other saw that he couldn't resist it, so he simply turned around and jumped off the fort wall to save his life.