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In September 205, the tenth year of Jian'an, an army of 15,000 people set out from Xuchang and headed for Hanzhong.

Earlier, when Cao 'Cao' got the topographic map of Xishu from Zhang Song, he was indeed quite excited. With this map, the mountain-shaped topography of Yizhou, the deployment of passes, can be seen at a glance, and the entire Yizhou will be unabashedly 'exposed' in front of itself. Under the guidance of this map, the difficulty of attacking Yizhou can indeed be reduced a lot.

Although there was still the idea of attacking Jiangdong first, Guo Jia, Cheng Yu and others were guided by the situation, and under the continuous persuasion of this group of scribes, Cao 'Cao' finally changed his mind and decided to use troops against Xishu first.

Although Cao 'Cao' didn't like Zhang Song, and even had a deep prejudice and disgust for him, the other party had the merit of offering pictures after all. In order not to chill the hearts of the people in the world, Cao 'Cao' also assured Zhang Song that after Cao's army successfully entered Shu in the future, he would definitely give high-ranking officials generous and never hesitate.

Zhang Song, who got Cao's '' promise, was also happy in his heart, and went back to Yizhou in a hurry. For now, he must also return to Yizhou to resume his life, and by the way, do some internal work.

Under Zhang Song's cover, Liu Zhang did not know that Cao Cao's plan against Yizhou at this time, because the ostensible purpose of Zhang Song's trip to Xuchang was to ask Cao Cao' to help deal with Zhang Lu, so Liu Zhang really thought that Cao Cao's 'Cao' responded to Zhang Song's request to help him crusade against Hanzhong.

This is also extremely good news for Cao Jun, who has already calculated or not, and the chances of winning are naturally a little bigger.

Of course, among Yizhou, there are naturally a lot of capable people, and many people think that Cao's 'Cao' ambition is so great that it is impossible to inadvertently get involved in Yizhou, and asking him to send troops to help is tantamount to luring a wolf into the house, if Cao 'Cao' defeats Zhang Lu, then his next target will definitely be Yizhou.

Like Huang Quan, Liu Ba, Li Hui and others, they have all persuaded Liu Zhang not to flatter Cao '', but under Zhang Song's 'bewitchment' and deception, Liu Zhang did not listen to those unfavorable advice.

Zhang Song alone is enough, and Fa Zheng also stood on Zhang Song's side, explaining to Liu Zhang the advantages of getting Cao Cao's ''. Based on Zhang Song's rhetoric alone, maybe Liu Zhang can't rest assured, but since even Fa Zheng said so, Liu Zhang has nothing to hesitate.

Liu Zhang and Cao 'Cao' made an appointment, and the two sides sent their own troops to attack Zhang Lu from the north and south.

Gao Shun fell into the camp of 3,000, Zhang He's Euphorbia 5,000, Zhao Yun's assault battalion 3,000, Huang Zhongshen's arm battalion 2,000, and Cao Zhen and Xiahou Shang each carried 1,000 troops, a total of 15,000 soldiers and horses, which is all the troops that Cao's army relied on to attack Hanzhong and even conquer Yizhou in the future.

As for sending more soldiers, Cao 'Cao' is difficult to do, Cao Jun's ostensible name in this battle is to send troops as reinforcements from Yizhou, and the troops sent are naturally not too many. Send an army of tens of thousands to help Liu Zhang attack a Hanzhong? Is the relationship between Cao '' and Liu Zhang so good? If he really did this, even if Liu Zhang was mediocre, he would definitely realize that something was wrong.

In addition, Shuzhong is mountainous, and sending too many troops is not conducive to marching, and the number of fifteen thousand is just right.

Third, Cao 'Cao' must send a certain number of troops to guard against Sun Jian in Jiangdong, and after the elimination of Han Sui, the Qiang 'chaos' in the northwest is also intermittent, and it is necessary to set aside some 'fine' forces to deal with it.

Therefore, Cao 'Cao' sent an army to attack Shu, only 15,000 people.

However, although the number of the 15,000 troops is small, every soldier deserves the title of "'elite'". Under the premise that Liu Zhang is defenseless, it is not impossible to take Yizhou.

The chief general of the whole army is Gao Shun, the general of Zhendong, and the rest of the generals are his deputies.

As for the position of military advisor, it is held by Lu Xun.

Over the years, Lu Xun's talent has been fully revealed, and Cao 'Cao' no longer let him continue to stay in the trap camp to serve as a member of the army, after all, although the trap camp is the first 'elite' division of Cao Ying, but with Lu Xun's talent, let him serve as a battalion to join the army, after all, it is overkill.

The current Lu Xun is already a long history, and his identity is much more prominent than in the past. Moreover, Lu Xun is only twenty-three years old this year, which is extremely rare to be in such a position at such an age.

If Lu Xun is his military advisor, Gao Shun is not surprised, then the candidate for the deputy military advisor is enough to surprise him.

The deputy military division is Sima Yiye.

Sima Yi is four years older than Lu Xun, and his talent is not below Lu Xun, even if he is allowed to serve as a military advisor, he is completely qualified. It's just that Lu Xun has participated in many battles over the years, and his reputation and merits are available, while Sima Yi has not experienced battles, and now he is only a thin talent, so he is far from being able to compare with Lu Xun in Cao's 'Cao's mind.

It is said that Sima Yi's position as deputy military division this time was strongly recommended by his brother Sima Lang in front of Cao Cao', otherwise, the position of this deputy military division would not be his turn.

Sima Lang is now the assassin of Yanzhou, and he is quite trusted by Cao Cao, and he can speak in front of Cao Cao, and he strongly recommends Sima Yi as the deputy military division for this battle, obviously to give him the opportunity to make meritorious contributions.

Sima Yi's repeated refusal of Cao's 'Cao' expedition before made Sima Lang's brother a little dissatisfied, thinking that his younger brother did not seek advancement. And now, since Sima Yi has entered the ranks, of course Sima Lang has to try his best to promote him, how can he be a mere literary scholar, how can he meet the identity of the son of the Sima family in Hedong?