Zheng Sen did not stay long in Beijing, he only left an infantry battalion in Beijing, mainly composed of conscripted militiamen, temporarily controlled the imperial palace and several important city gates, and found those Ming generals who had surrendered again, warned them to strictly abide by the rules and not to harass the people, and then led the other troops to the west to pursue Li Zicheng.

Zheng Sen knew that most of these "Ming Army" generals would not be so honest. But in a sense, that's exactly what he needs. With the merit of recovering Beijing, King Fu's ascension to the position of the Son of Heaven is not a big problem. But what Zheng Sen needed was not a capable Son of Heaven, but a Son of Heaven who was theoretically legitimate, but was generally despised. Now these rebels will be saved by King Fu, and if they do anything wrong, it will inevitably damage King Fu's reputation, and on the other hand, out of the instinct of the ruler, King Fu definitely does not want his generals to be all Zheng Sen's people, and he will definitely win them over to balance Zheng Sen. And these guys will definitely be pampered and arrogant, and make all kinds of angry things.

On the other hand, those Donglin Party members who control public opinion have an enmity with King Fu, and they will definitely not let go of the opportunity to smear him. They will surely be able to compare the black king of Fu to that of Africans. At that time, Zheng Sen came out to set things right, set aside the Son of Heaven, and even usurped the throne, I am afraid that it will be expected by everyone.

When Zheng Sen's army was chasing the Shun army, Li Zicheng had already left for a day. However, Zheng Sen is still very confident that he can catch up with Li Zicheng. Since its establishment, the Model Army has attached great importance to the ability to march, to the ability to move troops, to the ability to move forces, and to logistical support. The daily march distance of the model army could reach 70 miles, which was far from being comparable to the 14-hour mountain attack of a certain king of light infantry of later generations, but it was already more than the speed of the army of the later Emperor Napoleon, and nearly twice as fast as the general march speed of the army of this era. So Zheng Sen is not worried about not being able to catch up with Li Zicheng at all.

Of course, Li Zicheng will definitely make the army march in a hurry. However, it was impossible for Li Zicheng's army to march too fast. There are prerequisites for the army to move fast. The first is the organization of the army. The Model Army is an army that has been brainwashed by nationalism and Zheng Sen's ideology, and its platoon-level officers have been educated. Even ordinary soldiers, after entering the army, received a basic literacy education, which made this army far more organized than other armies of the era. This level of organization not only enabled the army to complete tactics that were unimaginably complex in the eyes of other armies of the era, but also greatly increased the army's ability to endure temporary difficulties, greatly improved morale, and thus increased the speed of marching.

Secondly, the physical training of the model army is also far superior to that of other armies of this era. A model army that has been completely out of production and has received sufficient protein supplies can train every day, but Li Zicheng's army has difficulty even having enough to eat in peacetime. Naturally, it is impossible to carry out such a "three from one big" training. As a result, their endurance level is much lower than that of the model army.

Finally, there is the advantage of logistical supply. The number of cavalry in the Model Army was limited, but their infantry had a lot of horses, and Zheng Sen was even willing to sacrifice the number of cavalry to a certain extent in order to ensure the speed of the infantry's long-distance march. This makes their ability to transport baggage quite good. There is another huge difference between the food of the model army and other armies, that is, it contains a lot of high-calorie things such as fat and protein. As a result, the net weight of food required by each model soldier per day was significantly lower than that of other armies that relied on simple grains as their main food. (You can talk to your father or grandfather about this, in the era of lack of fat and protein, people ate much more than they do now) This also led to a significant decrease in the weight of the food that had to be transported. This, in turn, further increases the mobility of the army. Even because of the existence of high-calorie food, the soldiers of the Model Army were able to rely on the dry food they carried with them to support the march and battle for far longer than the army of this era.

Because of these advantages, Zheng Sen had little doubt that his army would be able to catch up with the Shun army. He even hoped that the Shun army would be able to walk faster when retreating, because it would mean that the Shun army would lose more physical strength during the retreat, so that when the model army caught up with them, it would be easier to defeat them.

"Let the light cavalry chase after them first, and make it look like you're going to hold them back." Zheng Sen thought, "Li Zicheng will definitely not dare to fight a decisive battle with our army, he will most likely sacrifice some troops, most of which are his remaining cavalry, so that the main force can forcibly march and escape." Especially when they know almost nothing about our marching capabilities. If he does, I'm almost certain that we'll be able to defeat him in a chase! ”

Zheng Sen communicated his idea to his generals, and everyone also expressed their support, and Yu Xin even proposed: "Major General, I think we can actually let the heavy cavalry troops chase after them first." Well, Major General, I know that the marching ability of the heavy cavalry units is not too good......"

Indeed, the marching ability of the heavy cavalry of the Model Army was not good. Andalusian horses are not known for their endurance, at least not in this respect. And the logistical pressure caused by the tall Andalusian horse is also not small. Coupled with the weight of the armor, so, when it comes to the ability to march, especially the ability to march long-distance, the heavy cavalry units of the model army have a much worse long-distance marching ability than the infantry, basically, if the continuous march lasts for more than six days, the infantry must stop and wait for the heavy cavalry.

“…… We don't wear armor, we use heavy cavalry for light cavalry. In this way, on the premise of ensuring combat effectiveness, our marching ability in two or three days will not be much worse than that of light cavalry, which is enough to catch up with the thieves. Even if we don't have full body armor, we still have a little more advantage over the average light cavalry, after all, our horses are much taller. Even if you put on the light cavalry, it is enough to defeat the cavalry of the thief army. Moreover, the cavalry of the invading army is actually not very elite, and relying on heavy cavalry alone is enough to defeat them. "Yu Xindao." Our scout cavalry found traces of a large group of men and horses marching on the road to Zhuozhou. Li Zicheng seems to have bypassed the capital and planned to retreat from the direction of Zhuozhou. Considering that Li Zicheng has been gone for a day, if he walks fast enough, we estimate that he will be able to reach Fangshan tomorrow. At the speed of our cavalry, we will rush over on a rapid march and catch up with him tomorrow at most. He probably had to leave the cavalry behind, hold us back, and flee to Zhuozhou at the same time. In order to be able to repair in Zhuozhou. In Li Zicheng's opinion, after our cavalry defeated their cavalry, they were afraid that they would not be able to fight for a short time. After a little repair in Zhuozhou, they can get rid of the pursuit of our army. But with the marching ability of our army, if we force the march, before the main force of the thief army arrives in Zhuozhou, the main force of our army should be able to catch up with the enemy army, and at this time, the enemy army should be extremely exhausted, and our army should be able to easily defeat the enemy army, and at this time, the combat effectiveness and horsepower of our light cavalry are preserved. We can use the light cavalry to pursue and disperse them, so that Li Zicheng can escape with a few men at most, and we will definitely be able to capture all his main force. Hehe, there is another group of people in Luzon who can farm and work. Major General, I don't know what you think of this? ”

"You chase after them with heavy cavalry, can you guarantee to catch them up in Fangshan and leave the rest of their cavalry behind?" Zheng Sen stared at Yu Xin and asked.

"The last general is willing to make a military order!" Yu Xin hugged his fist.

"Come less." Zheng Sen said with a smile, "We don't have anything in this book in our army. If you have faith, we'll do it. Anyway, we will definitely win this battle! Not only must we capture all Li Zicheng's thieves and soldiers as much as possible in this battle to Luzon to farm, but it is best to kill Li Zicheng. Extinguish the rebellion in the country in one fell swoop. ”