In the first battle of Yanzhou, with the cooperation of the Suzaku Battalion, the Gaoshun Liaodong Army became more and more proficient in the use of new tactics, and the four-day attack will be in the Leping City, the famous general of the Cao Army, Le Wenqian, can not raise his head and can only support it, although Liu Yi stopped the first-line attack operation out of the overall strategic considerations, but the advantages of the Yan army in this battle are undoubted. But in Hanzhong, the attack launched by the Cao army on the city of Hanzhong suffered a great setback at the beginning, and Zhang Liao's Yanyun army defended like an iron wall, greatly boosting the morale of the army and people in Hanzhong!

However, there is always a difference between offense and defense, as the attacking side of the initiative to control the battle situation, this is undoubted, the first few days of the attack is unfavorable, a large part of the reason for the serious loss of soldiers is that the Cao Ying people to the Yan Army's defensive power, especially with the equipment battalion can not adapt for a while, after that, they are constantly testing the advantages and disadvantages of the opponent's tactics, and on the fifth day, they have found some ways to deal with it, and the attack and defense of both sides have become more intense!

Of course, Zhang Hu and Zhang Liao are fully psychologically prepared for this change, the elite of the Cao army is not under the Yan army, and the experience of the battle formation is extremely rich in both Cao Cao and the generals under his command, so it is absolutely difficult for them to be at a loss forever under the city of Hanzhong, which is also the reason why Zhang Hu invited all the people in Hanzhong to watch the battle on the first day when the Cao army began to officially attack the city, and used the actual battle situation to enhance their confidence in sticking to Hanzhong! Cao Jun will definitely come up with effective countermeasures, and Zi has no doubt that at that time, watching the battle will not have the effect of that day.

The strength of the Yan army's defense lies in the strength of the Yan Yun soldiers and Zhang Liao's command, but it can be seen from a distance that its methodical tactical movements on the city tower, and the long-range precision attack of the enemy's equipment battalion on their own siege equipment is also the main reason, it is extremely difficult to succeed in attacking a strong city like Hanzhong without relying on siege equipment and relying on crowd tactics alone, especially the opponent in the city is Zhang Liao and his Yan Yun army! Therefore, Cao Cao and his subordinates carefully discussed and had a few days of tentative observation of the enemy's tactics in detail, and then made the decision that it was necessary to suppress the enemy's equipment battalion first!

Seeing this, people with a little military common sense can make a judgment, but how to suppress the equipment battalion is a huge problem, both the range and accuracy of the opponent are far above themselves, and it is undoubtedly self-inflicted humiliation to use equipment against equipment. The power of the Yan army's stone carts located at the head of the city is much better than that in the walled city, two reasons are the key, one is condescending, needless to say here, it is impossible to change, and the other is that the field of vision is wide and not threatened, they can calmly target the Cao soldiers or siege equipment for careful aiming and launching, so as to raise the accuracy of shooting to the highest, although this is also the advantage of the Yan army, but compared with the natural formation of the former, it can be limited by some means, If you want to suppress the power of the Yan Army's equipment battalion, you must first blur their vision and make their shooting accuracy reduced.

This idea is correct in the eyes of everyone, so how can it be done to blur Yan Jun's vision? The answer is smoke attack! The southeast wind that blows from time to time in spring will also become Cao Jun's helper at this time, and tens of thousands of soldiers will work in shifts day and night to collect dead branches and grass, and pile them up at the upwind outlet one hundred and fifty steps away from the city! Of course, these actions were completed at night, and the power of the Yan army's equipment battalion would also decrease a lot at this time, speaking of which, attacking the city at night was also a good way to limit the opponent's vision, but Cao Cao did not dare to do it easily, the defenders in the city were not a rabble, and the disadvantages of attacking the city at night were greater than the advantages obtained by this.

Since the Yellow Turban Rebellion began with the princes fighting for hegemony, I don't know how many times this siege war has happened before and after, but there are very few examples of really daring to launch an offensive at night to attack Jiancheng, the Battle of Changshe Bocai led the Yellow Turban soldiers to attack the famous general Huangfu Song of the Han Army, and the attack on Anxian County led by Zhang He in the Battle of Jizhou is another example, but you can find the subtleties as long as you look closely! On that day, the Yellow Turban army besieged Changshe, and Bo Cai wanted to take the city before the arrival of Han reinforcements, which was really a last resort, and the Yellow Turban soldiers were more like a rabble than the Han army, and for them, there was not much difference between the siege and the night!

The night battle of Zhang He's attack on Anxian was more like Gao Shun's attack on Leping, using the sky-bombing cannons of the Suzaku Battalion to harass and attack, and there were very few attacks launched by real soldiers. At that time, Changshe or Anxian County was far from being comparable to Hanzhong City in terms of the scale and solidity of the city! In the battle of Jizhou, Liu Yi and Gao Shun led more than 100,000 troops to attack the southern part of the city, under the stubborn resistance of Liyi, it was difficult to make a big breakthrough after more than ten days, and in that storm, Gao Jingfang, who was a good general of the siege, had no idea of attacking the city at night, and Liyi would not give him a chance.

It can also be seen that the night siege is more just used as a surprise attack tactic, and must take into account the defense ability of the opposing generals, if it is discussed here, Zhang Liao is by no means under the Yi of Koji, this kind of dangerous tactic Cao Cao will not take at least in front of him! In the daytime, when the wind rose, the Cao Ying archers lit the slightly wet firewood and grass with rockets in the distance, and the billowing smoke rushed to the head of Hanzhong City, and the Cao army siege soldiers all covered their mouths and noses with wet cloths and rushed up! And Zhang Liao also had the same way of dealing with it, but at the downwind, the impact of the smoke on the soldiers of Yan Yun was far better than that of Cao Jun, especially the equipment battalion, which was even more difficult to exert their might.

If the ammunition is enough, just like the Vermilion Bird Battalion under Leping City, Zhang Liao will not hesitate to order the equipment battalion to carry out a joint attack, even if the line of sight is blocked, the accuracy is greatly reduced, but the stone bullets flying in the sky can still bring a certain amount of damage to the Cao army! However, although the preparation of the Yan army in Hanzhong City is not insufficient, but the storage of stone bullets has a limit after all, this offensive and defensive battle will be extremely long-lasting, and Wen Yuan will carefully control the consumption of ammunition in the equipment battalion in peacetime, let alone when this vision is blocked. The attack must consume stones, and the city is by no means as convenient for supply as in the wild, which is the second weakness of the Yan Army's equipment battalion summed up by the people of Cao Ying, and naturally they will not let it go.

Of course, even if the impact on the Yan army is greater, these thick smoke also have a great hindrance effect on the soldiers of the Cao army attacking the city, but what they have to do is relatively simple, just put the cloud ladder on the city wall and climb up desperately, even if they also have their eyes closed, they still have a cloud ladder to point out the direction of progress, but the defenders at the head of the city want to effectively strike at the enemy troops who climb up will become more difficult, compared to the two is obviously the advantage of the attacker.

After this day's fighting, the number of times Cao's soldiers climbed the city increased significantly, and these smoke also played an important role, he would make Zhang Liao's sharp weapon to observe Cao's army and judge his tactical use of the arrangements made in advance to greatly restrict! Cao Cao didn't know that the long tube in Zhang Liao's hand had such a miraculous effect, but this smoke attack method was crooked, and without the observation of the clairvoyant mirror, Zhang Liao's response was difficult to be as fast as the day before yesterday.

The most favorable factor for Cao's army is still the direction of the wind, this southeast wind blew for almost a whole day, in addition to the soldiers who attacked the city to move forward bravely, the team of adding firewood and grass was also very busy, at least on that day, luck was also on the side of Cao's army! In this case, the white-knuckle battle at the head of the city inevitably unfolded between the two world-famous elites of the Yan army and the Cao army, and the generals of Cao Mengde and Cao Ying, who were under the city, could not see the situation of the battle at the head of the city due to the obstruction of smoke, and the fierce battle between the two armies could be heard from the loud shouting of the battle!

Since the moment when the wind rises in the early morning, the whole day of Hanzhong City is shrouded in black smoke, the shouting and killing of the soldiers on both sides of the inner and middle sides has never stopped, the impact of Cao Jun's attack on the Hanzhong city is as durable as the waves, once Cao Cao seizes the opportunity to fight with all his might, at this time the casualties of the soldiers will not let him take it to heart, compared to the battle situation of the previous days, today's battle situation can be called a reversal!

Of course, a fortified city like Hanzhong has a defender like Yanyun Army, no matter how many opportunities the enemy's cunning and clever methods occupy and even luck is helping them, it is impossible to take the city through a day of fierce fighting! Cao Cao and his subordinates didn't have this idea, they just wanted to use the advantage in their hands to consume the opponent's forces as much as possible, and use this to hit the enemy and boost their morale! Such a southeast wind will never be every day, the so-called opportunity will not be lost again, since the fighter plane has been seized, we must think of ways to give full play to the advantages!

The offensive and defensive battles are killed from early morning to dusk, the city is already densely covered with the corpses of the soldiers on both sides, in this kind of unclear melee, the two soldiers are more by virtue of their own experience and a bloody courage in the fight to the death, close combat everything has become their weapons, there is no lack of Cao Jun corpses strangled alive by the Yan soldiers above the city, and under the city there is also indispensable by the Cao army entangled in a place and fell from the city tower to the Yan army corpse, both fighting spirit and combat power are comparable, The physical strength of the Yan army could not be brought into play due to the continuous killing of the Cao army, and the two sides were defeated by dusk, and both suffered the greatest casualties since the beginning of the war!

But it was also a heavy casualty, the mood of the generals of Cao Ying was diametrically opposed to Zhang Hu, Zhang Liao and others in Hanzhong City, even if the number of casualties exceeded any previous day, but today's battle situation undoubtedly made Cao Jun excited, and they seemed to have found an effective way to deal with the Yan army's defense! And the casualties of the Yan army on this day exceeded the sum of the previous days and many more, this is not the main aspect, the key is that they must come up with a solution as soon as possible, otherwise the Hanzhong guards are not optimistic!