When receiving the urgent report from the Yanmen front, Cao Liang was dealing with the remaining problems in Jiuyuan City, this time the Xiongnu prisoners of war were particularly many, how to settle it was obviously a big problem, and they couldn't all be allowed to dig coal, it seemed that the Huns captured in the battle of Jinzhong were enough, and it seemed that the next thing to do was to find some work for these Huns.

Liu Bao and Liu Jiao, who fled, are no longer afraid, with the little people in their hands now, they can't set off any storms in Bingzhou, but in line with the principle of eliminating evil and purifying, Cao Liang will not let them escape.

Sending the Yue cavalry battalion and the tun cavalry battalion to pursue, Cao Liang did not have to worry about the lack of troops, with the combat effectiveness of the Yue cavalry battalion and the tun cavalry battalion, it was more than enough to clean up the remnants of the Huns.

The only thing that worried Cao Liang was whether the Yue cavalry battalion and the tun cavalry battalion could catch up with the defeated soldiers of the Xiongnu, after all, the northern Jin Dynasty was vast and the terrain was complex, and the Wei army was relatively unfamiliar with the terrain here, and it would be difficult to track down if the Huns were hiding.

But the news from Yanmen Pass made Cao Liang secretly taken aback, and he didn't expect that the Xianbei people would attack Yanmen Pass at this time, which was indeed unexpected by Cao Liang.

Xianbei people are one of the Wuhu, of course, they are the enemies that Cao Liang plans to get rid of, but they live far away, and Cao Liang has no plan to deal with them at present, but he didn't expect them to attack the Central Plains in advance, and the comers are not good!

The period when the Xianbei people were more active was still the period when Budu Genke was able to do so, especially Kebineng, who was ambitious, but good at playing tricks, and was extremely deferential to the Wei court on the surface, but in fact he secretly cultivated and developed his own forces, annexed other tribes, and when he was full-fledged, he rebelled again.

However, after Kebi Neng was assassinated by the assassins sent by Wang Xiong, the Xianbei people were leaderless and fell apart, and the various departments were busy with war and no longer posed a threat to the Central Plains Dynasty.

Cao Liang knew that the resurgence of the Xianbei people was already a matter of the Western Jin Dynasty, at least during the Cao Wei period, they did nothing.

But unexpectedly, the Xianbei people actually attacked Yanmen Pass brazenly at this time, is this also a butterfly effect?

Of course, Cao Liang didn't know that all this was because there was a black hand behind the scenes, but he didn't dare to take it lightly at any time, because in Deng Ai's report, it was mentioned that the strength of the Xianbei people's attack was claimed to be 100,000 troops, and the leader of the army was Tuoba Liwei, and now they and the county soldiers of Yanmen Taishou Leqi are sticking to Yanmen Pass, but the situation is not optimistic, and reinforcements are urgently needed.

At the same time, Deng Ai's report also mentioned that they annihilated most of the Xiongnu soldiers and horses near Yanmen Pass, but it is a pity that Liu Bao, the king of Zuoxian, and Liu Jiao, the marshal of the central government, were not captured, Liu Bao fled westward and fled to Shuofang, while Liu Jiao took refuge in the Xianbei people, and the pursuit was unfinished.

Liu Jiao Cao Liang, who fled to Tuoba Xianbei, didn't care, after all, Tuoba Xianbei soldiers were strong and strong, and he would not send Liu Jiao's hundreds of people, and Liu Jiao's joining the Xianbei people would not play a role.

But Liu Bao's escape to Shuofang aroused Cao Liang's vigilance, especially when he broke through the Zi clan, Cao Liang also deliberately sent people to find Liu Yuan, but he didn't find it, Cao Liang also reflected in advance, Liu Yuan is just a few years old, with his ability, it is not enough to escape, unless Liu Bao planted a master by his side, and at a critical time, they took Liu Yuan away.

Others don't know, can Emperor Cao not know, this Liu Yuan is a very human being, and keeping him is a disaster after all.

Combined with Liu Bao's westward escape this time, Cao Liang faintly felt that all this should be arranged by Liu Bao in advance, the so-called cunning rabbit three holes, probably this is what it means, Liu Bao is cautious, scheming, and when the state started, I am afraid that he will be worried about failure, and secretly make a way out.

If this thief is not eliminated, I am afraid that there will be another disaster in the future.

However, with Cao Liang's current status and the forces in his hands, if he wants to go straight to Shuofang, he has more than enough heart but not enough strength, and he can't reach it.

The top priority now is not to track down Liu Bao again, but to think about how to deal with Tuoba Liwei.

Cao Liang disrupted the establishment of the three infantry battalions and divided them into four divisions, ordering Yanghu, Du Pre, and Wang Jun to each lead one to defend Jiuyuan, Dingxiang and Yuanping respectively, and the remaining one was led by him to reinforce Yanmen Pass.

Yanghu and others felt strange, since it was Yanmen Pass that was in an emergency, the Wei army should have rushed to the aid of Yanmen Pass, and the Xianbei people were powerful, and the Wei army at least had to gather heavy troops to deal with it.

Cao Liang's arrangement was naturally well thought out, and Yanmen Pass was naturally an emergency, if Yanmen Pass was lost, Xianbei people could drive straight into the state and enter the state.

But even if the Wei army held the Yanmen Pass, it was difficult to completely block the Xianbei people, after all, it was impossible to go south and merge with the state, and there could not be only one road from Yanmen Pass, in the east and west of Yanmen Pass, there were some steep mountain roads that could be passed, and the Xianbei people could use these passages to enter the state, but the road was easier than not as good as Yanmen Pass.

If the Xianbei people infiltrated Bingzhou from other areas, it would indeed be a headache, so Cao Liang made such an arrangement, so that Yang Yi guarded Jiuyuan, Du pre-guarded Dingxiang, and Wang Jun guarded Yuanping, so that in the northern area of Jin, a defensive formation of an iron triangle was formed, which was a horn for each other, which could be attacked and defended.

At the same time, Cao Liang asked Yang Yi and them to carry out the fortified wall clearing, and gathered all the Han people scattered outside the city into three cities including Jiuyuan to prevent the raids of the Xianbei people.

For the Xianbei people, Cao Liang is very clear, these guys are even more ferocious than the Huns, eating people without spitting out bones, if these guys are allowed to cause trouble and merge with the state, then the good situation formed after the pacification of the Xiongnu will be gone.

In response to the problem of insufficient garrison strength of the Wei army, Cao Liang and Yanghu ordered them to recruit Xiangyong and temporarily integrate them into the county soldiers to assist the Pingbei army in defending the city.

And this number Cao Liang does not restrict, in order to resist the invasion of the Xianbei people, Cao Liang asked them to recruit more Xiangyong, the better, after all, the Xianbei 100,000 army is coming, and the pressure on the defense of the state is very great.

After the arrangement was quickly made, Cao Liang immediately led a mixed infantry unit of 5,000 to rush to the aid of Yanmen. The speed of the infantry unit was relatively slow, and in order to prevent the enemy's halfway ambush, Cao Liang's entire march was very careful, and it took about three days for Cao Liang to finally arrive at Yanmen Pass.

At this time, the fierce battle at Yanmen Pass had already lasted for five days.