In early February, Yang Lin led the guard regiment, the Buning Cavalry Regiment, the 3rd Regiment of Long Zhiframe, the 6th Regiment of Jing Keqin, and the 7th Regiment of Feng Youqing from Bazhou into Baoning Mansion, and the army approached the city of Langzhong.

The Central Plains Dynasty has two avenues to enter Sichuan, one along the Yangtze River upstream into Sichuan, but it is very difficult to climb mountains along the way, just like the Japanese invaders in the War of Resistance Against Japan, successively in Yichang, Shipai was stubbornly blocked by the National Revolutionary Army and sighed.

The other one passes through Hanzhong and enters Sichuan along the Golden Bull Road.

Now Nanming and Sichuan's eastern participation in politics Liu Liangchang and deputy general Zeng Ying led their troops to seize Qianqing, completely blocking the possibility of the Great Western Army going down the river and out of Sichuan.

In this way, if the entire territory of Boryeong Mansion can be occupied, then Zhang Xianzhong will be trapped and killed in Sichuan.

The experience of his previous life told Yang Lin that the biggest threat to troops who are good at field warfare is

In history, if you want to keep the four Chuan, you should control Hanzhong. If Hanzhong is lost, you should guard the sword gate.

Langzhong is precisely the second line of defense of Jianmen Pass, in history Liu Bei occupied Hanzhong, unexpectedly appointed the general Wei Yan as the Hanzhong Taishou, and the famous right general Zhang Fei Zhang Yide was stationed in the rear of Langzhong.

In fact, this is a historical misunderstanding, if you analyze it a little, you will know that Liu Bei set up two insurmountable lines of defense in northern Sichuan, with Wei Yan as the Hanzhong Taishou to defend the front line, and Zhang Fei as the commander-in-chief of the northern Sichuan military affairs stationed in Langzhong.

If Cao Cao led an army of 100,000 to seize Hanzhong, and Wei Yan was defeated, Zhang Feike led the army to rush to Hanzhong along the Golden Bull Road and Micang Road to ensure that Hanzhong was not lost.

Even if Hanzhong doesn't defend it, it will be like Jiang Wei who retreats to the Sword Pavilion.

Even if the Sword Pavilion is not defended, if Cao's army attacks CD along the Golden Bull Road, the grain road in its rear will be attacked by Zhang Fei's group from Langzhong, and he will not be able to do his best.

If you attack Langzhong along the Jialing River, although the grain and grass are easy to transport, you will face many fortified cities in Langzhong, Shunqing, Hechuan, and Qianqing, and the war will be deadlocked.

Historically, the Yuan Dynasty entered Sichuan, controlled northern Sichuan, and divided the troops into two routes under the absolute superiority of troops, all the way along the Jinniu Road to raid the CD, while Meng Ge personally led the army down the Jialing River to attack Baoning Mansion, Pengzhou, Shunqing Mansion, and Hechuan.

The terrain of Langzhong is more dangerous than that of Shunqing, and the geographical location is far more important than that of Shunqing.

The Jialing River forms a U-shaped peninsula here, the Jialing River is rolling on the southeast and west sides of Langzhong, only the north is a tall hill, Zhang Fei was stationed here, it is the most dangerous place for the defense of northern Sichuan since ancient times.

Just as the national highway in the Ming Dynasty was introduced earlier, the national highway from Beijing to Sichuan CD via Hebei, Henan, and Shaanxi passed through Langzhong, which was a traffic artery.

After discussing the siege of Wei and the rescue of Zhao, in early February, five infantry regiments and one cavalry battalion crossed the Guanyin River ten miles east of Langzhong.

At the same time, Yao Zhijiao's 4th Regiment took a boat upstream, escorted by the navy, and quickly built a water village and fortifications after everyone disembarked, in case the rogue counterattacked.

Hearing that the volunteers were coming, they broke through five checkpoints in a row, and Zhao Ronggui, the rebel general who stayed in Langzhong City, was quite panicked, tried in vain to defend, and did not dare to fight in the field at all, leading the army to slowly withdraw to the city.

After two days of fierce fighting, the volunteers occupied the Baba Temple, Qieryan and other dangerous places in the north of the city, built forts, set up large Franc machine guns in them, and bombarded the densely populated places on the city wall from time to time.

The Fran cannon belongs to the son-mother gun, the firing speed is far above the general cannon, and it is now installed on the gun mount, and there is also a gauge on the gun mount to help aiming, and the firing degree is far higher than that of the general cannon.

Scattered bullets were fired into the air and rained down like scattered flowers, with a deviation of no more than twenty or thirty meters, often several artillery salvos, and the enemy on the city wall was often not spared.

Although Zhao Ronggui also organized an artillery team to return fire, the artillery of the Volunteers was set up on a hill half a mile away, not only sheltered by trees, but also at an altitude similar to the city wall.

Most of the artillery men of the Volunteer Army have studied private school for two or three years, and Yang Lin has trained a little basic knowledge of artillery from time to time, and the gunner's ability is far above that of the Great Western Army.

In addition, the Franco machine guns mostly use iron-core copper guns cast with iron film, and the artillery performance is far above that of the Great Western Army, and after several rounds of shelling, the Great Western Army is completely inferior.

At the same time, Yang Lin decided to use trench tactics, the last time he defended Shunqing City, he had dug a large number of trenches, and then arranged wooden spikes outside to prevent the opponent from attacking.

In less than two days, they dug three and a half deep, and then erected a small mound one person high, and under the evolution of the No. 3 Franc machine gun, the tiger squat cannon and various firearms squadrons, they dug forward in an inverted triangle pattern to more than 100 meters.

Zhao Ronggui didn't care at first, after he lived in the high wall, you can dig as much as you like, as long as you don't attack the walled city, whatever you want, you don't interfere.

Seeing the trench dug under the city wall, Fang suddenly realized, some people think that the volunteers will smash the city wall, in the past, the Great Western Army often did this, and now they see the Volunteer Army approaching the city wall, and the Great Western Army on the city wall is weak to deal with, everyone is frightened.

Zhao Ronggui also panicked, this Langzhong City is surrounded by water on three sides and mountains on one side, if you want to return to Shilangzhong from Yilong on the south bank of the Jialing River, you need to cross the Jialing River.

However, the volunteers have sharp artillery and many ships, so it will be even more difficult to cross the Jialing River, and if the waterway is blocked, it will be even more difficult to cross the Jialing River and lead the troops to rescue.

On the one hand, Zhao Ronggui sent a messenger to Liu Jinzhong's army, claiming that the Volunteers had approached the city and hoped to return to the division for rescue as soon as possible, but on the other hand, seeing that the trench had been dug under the city wall, he hurriedly sent soldiers and horses out of the city to fight, hoping to hinder the Volunteers from digging the trench.

The city gate opened, Zhao Ronggui personally led 3,000 soldiers and horses out of the city, from a distance to see that the volunteers did not react, everyone rushed forward with a big burden, so about ten steps, suddenly saw the trench thrown out of the door to shake the sky, smoke, fell into the formation.

Zhao Ronggui was shocked, could this be the legendary earth-shattering thunder? Under the city of Shunqing, the Great Western Army was killed and injured by the earth-shaking thunder.

But in this era, the people's knowledge is limited, although Zhao Ronggui knows the power of the earth-shaking thunder, but he doesn't know how to dodge.

And those officers and soldiers of the Great Western Army had never seen it in the past, and when they saw the smoking things thrown over, one by one they only prayed to the heavens for protection, and everyone desperately charged forward to avoid the calamity.

But the disaster star is not said to be able to hide, the earth-shaking thunder continued to explode, the entire front of the front of the shrapnel flew horizontally, thick smoke, in the sound of successive explosions, Feng Youqing, Ma Mingluan command post from the left and right directions.

Zhao Ronggui looked at this scene in horror, flying with big knives, forcing everyone to rush forward, but in front of them were the volunteers who rushed over, they killed with the support of the Tiger Squat Cannon, Franco Machine Cannon, and Musket Squadron, and rushed into the panicked crowd, rushing left and right, unstoppable.

The Liukou was defeated, and under the escort of more than ten pro-soldiers, Feng Shuangli retreated to the city under the escort of everyone.

Standing on the city tower, seeing the people crowded together outside the city gate, and the volunteers actually mixed in, worried that the city gate would be lost, Zhao Ronggui ordered the city gate to be closed, and watched hundreds of pro-soldiers cornered, one by one raised their hands to surrender.

Seeing that the 3,000 soldiers and horses of the department were defeated in less than half an hour, more than 200 people were killed in the first battle, and the number of wounded and captured reached 6 or 700, and the morale of the entire city was low, Zhao Ronggui was very annoyed, and constantly sent messengers to the front-line military camp, hoping that Liu Jinzhong could withdraw the army to rescue.

Under Yilong City, Liu Jinzhong was annoyed, listened to the strategy of Yuan Tao and Hu Jiusi, and wanted to surround Wei to save Zhao, who expected that Yang Lin would not be moved, and after quickly controlling the situation in Bazhou, he now actually returned the favor with his own way, and led more than 10,000 people to storm Langzhong.

Convening the generals to discuss, everyone thought that Yang Lin was just a strategy to encircle Wei and save Zhao, and everyone was not too panicked, and slowly arranged a strategy to return to the army.

But looking at Zhao Ronggui's emergency documents, this is to encircle Wei to save Zhao, and it is clear that he wants to seize Langzhong and control Baoning Mansion.