The loss of Chongqing and Shunqing Mansion is very fatal for Zhang Xianzhong, because from Shunqing you can go north to attack Baoning Mansion, and then Cao Bianjiao can march from three directions to capture Zhang Xianzhong, for Zhang Xianzhong, this is a great threat, although Bashu is mountainous and dangerous, but he will go over the mountains and mountains, is Cao Bianjiao can't, according to the information he got, Chongqing Mansion is still Qin Liangyu is still garrisoned, that is a Sichuan geography, much stronger than him.

Zhang Xianzhong does have a lot of soldiers and horses, there are five or six hundred thousand people, but only he knows that in addition to the royal camp around him, the rest of the people and horses are not strong in combat, he is a person who has repeatedly suffered losses in the hands of Cao Bianjiao, and he is a little afraid of Cao Bianjiao in his heart, and even if Cao Bianjiao does not attack Chengdu, will he attack Banzhou and Xuzhou at that time, Fan Yixuan and Wang Yingxiong are in Zunyi, and there are tens of thousands of horses in their hands, and Lizhou Tusima Jin Jian can't hold on, all parties are ready to move, he has to guard against it!

Between Rongchang and Neijiang County, there is a Sexi River connected. The Sexi River is a tributary of the left bank of the Tuojiang River, the riverbed is not wide, most of the water surface is only a few zhang wide, and the narrowest place is even only one or two zhang wide, but the water flow is very gentle, because this generation of terrain is gentle and belongs to the hilly area. There are ancient Buddha Mountain, Luocan Mountain, Tonggu Mountain and other high mountains traversing it, the terrain is high in the north and low in the south, and it is bounded by Luocan Mountain.

Zhang Xianzhong's troops did not lack mules and horses, and the roads were not difficult to walk, but it was much more convenient to go down the river by boat, whether it was to transport supplies or to march. This time Zhang Xianzhong did not drive the expedition, he is already the emperor of the Great Western Kingdom, everything must pay attention to an identity, when fighting, you can hand it over to the following to do, if they do not do well, they go by themselves, and they can add a little strength, and also divide troops to guard, it is not cost-effective, so this time Zhang Xianzhong sent his own righteous son Kewang, as well as his generals Zhang Hualong, the governor of the right army, Wang Shangli of the Chinese army, and the former army Wang Dingguo, a total of 19 battalions, nearly 100,000 soldiers and horses came, in order to deal with Cao Bianjiao, Zhang Xianzhong spared no effort.

100,000 soldiers and horses, in fact, most of them are young and strong who have not gone through much battle, only a few of their subordinates are veterans, only two or three out of ten, the vast majority of them are the people who were coerced or took the initiative to defect after occupying Wuchang. But even so, Sun Kewang also seemed quite relaxed, and they didn't think that there would be any trouble in this march at all.

He has already talked about the details of Cao Bianjiao, there are only 20,000 horses, even if Qin Liangyu's department is added, it will never exceed 30,000, and he also divided troops to guard Shunqing and Kuizhou, and Chongqing Mansion only has 15,000 men and horses, they are six times the opponent, and there are enough muskets and artillery, which is enough to deal with Cao Bianjiao, and it can also be shameful.

In a small county like Rongchang, there will never be many garrisons, at most a few hundred soldiers and a few thousand people, only a thousand or hundreds of people, even if there is a city wall to lean on, but they can't stop their attack at all, as long as they directly attack the city, send a ruthless shot, and fight to pay some casualties, it is easy to take the city. The focus of Cao Bianjiao's defense should be in Jiangjin and Fotu Pass, the key places of Chongqing Prefecture, and Sun Kewang can guess seven, seven, eight or eight.

In the middle of the night, there were sporadic fires on the Sexi River, and countless torches formed a winding fire dragon on the water. The men and horses led by Sun Kewang finally appeared in the Sexi River in front of Rongchang County, they should not have marched at night, but Sun Kewang wanted to send good news to Zhang Xianzhong earlier, so he marched overnight, and came to Rongchang City in midnight, and he also wanted to catch the defenders off guard. After the arrival of the Great Western Army, they quickly landed on the shore, and the front troops landed on the shore in a group, and then formed a group on the river beach, not far away was their target Rongchang City.

"Haha, brothers, take the county seat before dawn, the silver and the women are all ours" The captain of the squad laughed and shouted, looking very excited.

"Come with me, Siege!" Wang Dingguo, the governor of the Chinese army, took the lead, and rushed towards the county seat one or two miles away with a group of men and horses who dismounted, wanting to seize this first achievement.

And just on the nearby Luocan Mountain, in the dark, Cao Bianjiao, who was hiding here, looked at the scene with a smile, holding a telescope in his hand, which was obtained from a foreign missionary when he returned to Nanjing last year, this thing is very common in the West, but in the Ming Dynasty, it is very rare, Cao Bianjiao also got it.

"Dashuai, the thieves have all gone ashore, shouldn't we attack?" Zu Dale, who was standing beside Cao Bianjiao, also reminded in a low voice, gearing up and looking like he was ready to try.

"Wait a minute, the show is not afraid of late, don't be in a hurry, they only have a few thousand people on the shore now, what's the matter, we have to let half of them land before they start, and Zhang Junyong still wants to give his old friend a meeting gift, how can we stop it, how unkind it is."

When Zu Dale heard this, he also laughed, but he didn't dare to laugh too loudly.

"Boom, boom......, boom" Just when Wang Dingguo and his men and horses had rushed to the city, suddenly countless torches lit up on the city, and a cannon rang out, and began to shoot cannons in the distance outside the city.

"It's a plan, there is an ambush, ......withdraw quickly" Wang Dingguo immediately knew that something was wrong, he was too anxious, he didn't even have a tentative attack, so he rashly attacked the city, he didn't expect the other party to be prepared, look at this posture, no less than 3,000 people!

The people in front were attacked by bows and arrows and muskets, and fell to the ground one by one wailing, and the people who rushed up in the back were covered by artillery fire.

"These fools, I thought that when I entered Sichuan, I didn't meet Cao Dashuai before, if I met Cao Dashuai, I don't know how many times, I thought that the small county town was already in the bag, and I dared to be so arrogant." Zhang Junyong glanced at the battlefield casually, ignoring the pain of his former colleagues, in front of him, now he is the enemy, and the comrades in the city are comrades.

"These guys, they are still in such a hurry to die, it's rare!" Zhang Jun also sneered with Jiang Zhu beside him.

The Great Western Army was indeed out of order, the people in front rushed to the city, did not wait for the people behind to arrive, did not form a team, charged vigorously, encountered resistance, and after being attacked suddenly, they trampled on each other and fled, not caring about the companions around them, running wildly, and there was no order at all.

There are 2,700 men and horses in the whole Rongchang City, equipped with a total of 50 tiger squats, and three small Buddha cannons, the sound of guns and cannons comes and goes, and the guys who just shouted to go into the city to get money to find women are chickens and dogs, and they are embarrassed.

At this time, Sun Kewang also heard the movement, and at first thought that it was the movement of his soldiers and horses starting to attack the city, but soon found out that it was not, his artillery had not yet disembarked, and the people who rushed up did not have so many muskets, and immediately felt that something was wrong, and then a soldier came up to report, saying that Wang Dingguo was ambushed and died under the city.

"Cao thief, it is really treacherous, I didn't expect that I would lose a lot this time, so I immediately sent an order, and everyone gathered into a defensive formation, and they were not allowed to attack the city without authorization." Sun Kewang also knows that when the enemy situation is unknown, he can't attack rashly, who knows how many soldiers and horses there are in the city?