Lin Yi, as a time-traveling person, knows about some major events recorded in history, which seems to have a prophetic sense in the eyes of others.

For 1638, Huang Taiji divided his troops into a detour to Mongolia to attack, Qiangziling and Qingshankou, Lin Yi had this account in his mind. Coupled with the two attacks on Gyeonggi and Huang Taiji in 1636 and 1637 and the two defeats, Lin Yi knew that they would inevitably intensify and make a comeback.

Therefore, Lin Yi strengthened the city defense here, built forts, stepped up military training, and released dozens of miles outside the Great Wall at night, 3,000 soldiers and horses were waiting for him, and after several months of preparation, his more than 200 miles of Great Wall defense line was impregnable.

On the Great Wall of 200 miles, there are mainly two fortresses, one is Xifengkou, the other is Qingziling, both of which are equipped with red-coated cannons, a total of 50 guns, and then there are soldiers patrolling day and night in every place along the way, and there is a garrison point every 100 meters, this is a special platform on the Great Wall, mainly used for lookout, and Lin Yi sent eleven soldiers to be responsible for police equipment.

In addition, both fortresses on the Great Wall have higher lookouts, because the Great Wall is built on a mountain, which is already high and condescending, and with the help of monoculars, you can see far away.

On this day, a small flag commander on the lookout saw the six-pillar wolf smoke burning high on the vast grassland in the distance, and immediately reported to Lin Yi and Zu Keyong.

The wolf smoke is ignited at night outside the city, and if it is not collected at night, it is a professional scout in the Ming Dynasty. A pillar of wolf's teeth means that the Tartars have 10,000 soldiers, which means that the Tartars have 60,000 horses this time.

After Lin Yi learned of these battle reports, he immediately ordered 3,000 men and horses to enter the battle state. In addition, Lin Yi immediately ordered Pegasus to report to Liu Zhaoji, the general soldier of Miyun, to despise them strategically, and they must be paid attention to tactically.

After Liu Zhaoji, Lin Yi and Zu Keyong met and discussed, Lin Yi proposed to stand up for work. At the same time, send an army to ambush outside the city, cut off the return route of the Tartars, and then flank them from both sides, so that they have no return.

Liu Zhaoji is very much in favor. Half an hour later, there was a night without collecting Pegasus to report specific information, the enemy soldiers divided into two routes, all the way to Xifengkou, all the way to Qingziling, this time it was the two princes of the Qing Dynasty, Duoduo and Zierharang.

"These two guys are here, it seems that they are not good!"

For Duoduo and Zilharang, Lin Yi knows better.

Duoduo and Dolgon crawled out of a mother's belly, he was one of the eight iron hat princes in the early Qing Dynasty, the title was hereditary, he captured Hong Chengchou in the Songjin War, and after following Dolgon into the customs, he defeated Li Zicheng, broke through the Yangzhou massacre for 10 days, and later created the Jiading Three Massacres, killed Shi Kefa, went south to the south of the Yangtze River, and captured Zhu Yousong, the first emperor of the Southern Ming Dynasty. How many millions of Han people died under his hands? Emperor Qianlong called him the most meritorious of all the kings who founded the country, but in fact, his hands were stained with the blood of the Han people, and he was the executioner who slaughtered the Han people with the most heinous crimes.

Zilharang was Amin's younger brother, and although his father and brother died at the hands of Nurhachi and Emperor Taiji, he remained loyal to Nurhachi Emperor Taiji and was the only prince to be named an uncle other than Dorgon. He was a veteran of the Three Dynasties, following Emperor Nurhachi Taiji to conquer Mongolia and attack the dynasty until Pyongyang. After the Qing soldiers entered the customs, he pursued and killed Li Zicheng all the way. Later, Fu Lin succeeded to the throne for Shunzhi, and he became an auxiliary minister.

The two of them personally brought the troops here, this is undoubtedly a heavyweight of the Qing Dynasty, of course Lin Yi did not dare to underestimate them.

Liu Zhaoji decided to personally go out and lead 5,000 men and horses to ambush outside the city in order to cut off the return of the two Tartars.

In order to make this battle more certain, Liu Zhaoji, the chief military officer, also wrote a letter to his neighbor, Wu Sangui, who was stationed at Shanhaiguan, asking him to send troops to help. It's a pity that this Wu Sangui is very loyal, especially when he heard that Lin Yi, who he hated, was here, he tore the letter to shreds, and never sent a single soldier.

On the second day after Liu Zhaoji's 5,000 soldiers and horses left the city, the battle began.

Neither Duoduo nor Zilharang were reckless, and they also spent a certain amount of time figuring out the defense of the Ming army in the Miyun area. When they learned that there were a total of 8,000 Ming troops here, and the 200-mile defense line on the Great Wall was usually only garrisoned by Lin Yi's 3,000 people, they smiled contemptuously.

The two men divided the labor, Duoduo attacked Xifengkou, and Jierharang attacked Qingziling. The two of them planned to make Lin Yi unbearable and suffer from the enemy.

Of course, the two of them knew that these two were Lin Yi's key defensive areas, but they still chose these two as breakthroughs. Because the Great Wall was built on top of lofty mountains, it was difficult for other places to approach the Great Wall on high mountain heights, let alone fight wars.

Under the command of Duoduo, a banner of men and horses as the first echelon stormed Xifengkou Pass. Under the leadership of a solid mountain Ezhen, about 7,000 Eight Banner soldiers rushed towards Guancheng like a tide.

The 30 red-coated cannons on the city had already been aimed at the swarming Tartars.

Ten Ming soldiers are responsible for a red-coated cannon, each red-coated cannon is responsible for a ten-meter defense line, there are auxiliary cities built around the city gate, and there are urn cities built in the city gates, these are all newly built by Lin Yi, the red-coated cannons are erected on the battlements, and the urn city and the auxiliary city horse road are full of ammunition, arrows, logs, stones and other things to defend the city, piled up like a mountain.

The gap between the cannons and the cannons is filled with musketeers and archers, etc., so that they form a crossfire of near and far.

Lin Yi immediately commanded in person in the city of Guancheng.

The average height of the Great Wall is about 8 meters, and the width is about 7 meters. However, the walls of the castle were several feet higher, and the design of the Great Wall was built on top of the mountains, according to the topography, the inner walls appeared low, and the outer walls appeared high.

Therefore, where Lin Yi was immediately, from the outside of the Great Wall, he was standing on the top of the mountain more than three feet high, condescending, and through the single-tube telescope, the situation in the distance was very clear.

Today's weather was good, and he saw a place more than ten miles away in the distance, densely packed with Tartar soldiers, simply overwhelming, boundless, and all kinds of flags fluttering in the wind.

"Damn, 30,000 horses are really a lot, it's good to come, if you don't come, Lao Tzu will be busy these days!" Lin Yi gritted his teeth as he looked at these vicious Tartar soldiers, and his heart was ruthless.

At this time, the Eight Banners of the first echelon rushed over.

"Don't panic, let these Tartars get closer to the city."

Through the single-barreled telescope, Lin Yi could see clearly the noses and eyes of these Pegasus Tartars.

2000 m ...... 1000 m ...... 500 m ......

"Fire!"

Lin Yi gave an order, and the flag commander next to him waved the artillery flag down.

It turns out that Lin Yi's troops are now different, there are artillery, musketeers, and archers, if you follow another method, there are cavalry, and infantry, and so on. Depending on the type of troops, of course, the command flag of the herald is also different.

This is the order that is seen from the position of the artillery battalion, and here it is a general in charge of the army. It is an official position in the Beijing battalion and border army in the Ming and Qing dynasties, second to the garrison, and is probably equivalent to the battalion commander of later generations, according to the different establishments, managing three to five hundred people.

Lin Yi's 300 artillery officers in Xifengkou Pass now have a general in charge.

After receiving this signal, the ignition soldier who had been prepared next to the red-coated cannon ignited the fuse with a torch.

The gunpowder leads emitted a tendency to sneer, emitting strands of white smoke. After the ignition was ignited, he quickly retreated. The nearby soldiers were afraid that their ears would be shocked, so they hurriedly plugged their ears.

"Boom, boom, boom...... Knock knock knock ......"

The 30 guns roared continuously, and the ground shook. One after another, the cannonballs flew out of the air, landed accurately in the crowd of Tartar charges, and then exploded.

During this period, the most powerful firearms were the cardinal cannons. There are two types of shells for the Red Cannon, one is solid. This kind of shell has a long range, very high impact and destructive power, and is mainly used in stormed battles.

The other is a shot-like ammunition mixed with gunpowder, stones, pieces of iron, nails, and the like. Used to attack armies. However, the firing range is not as far as that of a solid bullet, but the killing area is large. Great lethality against charging and massed enemies.

Now, of course, they are using scattered bombs, and they can blow up a large area with one shot.

One of the Tartars was hit by a flying cannonball, and suddenly the people and horses turned into a fireball, soared into the air and then fell, becoming a rain of blood, and the bones were gone.

The Qing army outside the city suddenly cried wolves and howled, people shouted and neighed, and there was chaos.