The climate in the Ferghana Basin is warmer than in southern Xinjiang because of the surrounding mountains, and even in the coldest winters, the rivers rarely freeze.

Such natural conditions are undoubtedly fortunate for the inhabitants of the basin, who do not have to deal with the deteriorating natural environment outside the basin and can still rely on agriculture and livestock to support themselves.

However, when the war invaded the interior of the basin, it was undoubtedly unfortunate for the local population. The abundant resources and warm climate of the basin made it impossible for both sides of the war to have a truce.

For the Bukharan army, winter is a good time to fight a decisive battle with the invading Yarkand army, after all, at this time, the Alais and Fergana mountains have been covered by heavy snow, and the Yarkand people who invaded the Andijan region have lost their support.

Nadir Muhammad, the younger governor of Balkh, the younger brother of the king of Bukharakhan, had to send his son Abu Agis into the Fergana basin with 7,000 men to aid the Andijanians, after receiving the news of the Yarkand's preemptive invasion of Andijan. However, when Abu Ajis arrived in the city of Kokand, the Yarkand people were no longer in Andijan but outside the city of Namkan.

The city of Namugan was only eighty miles away from the city of Kokand, and Abu Aggis naturally would not sit idly by and watch the Yarkand people unscrupulously besiege the city of Namgan, so he united the army of the city of Kokand and gathered an army of 10,000 to kill the city of Namkan. The number of Yarkand troops besieging Namgan City was not large, and it was more of a siege than a siege.

Therefore, when Abu Aggis came with a large army to relieve the city of Namkan, the Yarkands made only a slight contact with the advance and turned back. Abu Aggis was thus warmly welcomed by the inhabitants of the liberated city of Namkan, and at the dinner party where Berk welcomed him, he also met Haidar, the son of Andijan Burke, who had fled to the city of Namkan. It is said that it was this brave warrior who broke out of the siege of the Yarkand and called the police to the city of Namgan, so that the city of Namgan, like the city of Margalang, was not successfully attacked by the hateful Yarkand army.

Abu Aggis asked the warrior from Andijan about the Yarkand invasion in detail, and Haidar's humble attitude and clear logic in recounting the war made Abu Aggis very fond of the Andijan and kept him with him.

At Haidar's suggestion, Abu Ajis sent the geographically familiar Kokand and Namganites to cut off the passage between the city of Margalang and Andijan before slowly advancing with a large army. Sure enough, as Haidar expected, the Yarkand army, whose back route was cut off, abandoned the city of Margalang overnight and fled back to the direction of Andijan, and Abu Agis recaptured the city of Margalang without much effort.

After occupying the city of Margalang, Abu Ajis actually no longer wanted to continue advancing, after all, the distance between the city of Margalang and Andijan is 180 miles, and it will take at least five or six days to arrive, and the situation in Andijan is not well understood, and God knows whether the inhabitants of the city have surrendered to the Yarkands.

Abu Aggis did not want to wait for him to rush to the city of Andijan and see a city occupied by the Yarkands, so he would have to attack Andijan without the superiority of his forces. Therefore, he preferred to wait for his father's army to arrive, and then attack together.

However, not long after Abu Aggis stayed in the city of Margarang, he first received an urging from his father, Nadir Muhammad, to rescue Andijan as soon as possible and drive the Yarkands back. Nadir Muhammad, the younger brother of the Yarkand Khanate, was under siege by political enemies at this time because of the invasion of the Yarkand people.

Imam Khuli Khan's health was declining, and the nobles of Bukhara knew that the day of the change of throne was not far off. However, Nadir Muhammad, as the younger brother of the king, had a violent and greedy personality, and was never liked by the princes and nobles of Bukhara.

Although he was the governor of Balkh, Nadir Muhammad also played a major role in defending the southwestern frontier of the Bukhara Khanate. As the capital of the Khorasan region, Balkh has been a focal point of the Bukhara Khanate's rivalry with the Safavids. The Balkh and Badak mountains were the separation areas between the Khanate and the Mughal Dynasty, and they could be said to be the three battlegrounds in this region.

Because of this, Nadir Muhammad preferred an authoritarian monarchy, in contrast to the moderate monarchy of his brother Imam Khurihan. The Bukhara nobles, who had enjoyed decades of peace, naturally disagreed with Nadir Muhammad taking over the throne, and Imam Khuli Khan was not the only one such brother.

To add to the anger of Nadir Mohammed, no sooner had he left with Balkh's army than the inhabitants of the northern part of Balkh revolted. The inhabitants had always been resentful of Nadir Mohammed's brutal rule in the past, and simply rebelled against the transfer of his descendants.

The uprising of the inhabitants of northern Balkh not only gave Nadir Mohammed's political opponents another excuse to attack him, but also put Balkh in danger. If the civilian uprising is not quelled as soon as possible, the neighboring Safavid and Mughal dynasties may not have any thoughts about Balkh.

Instead of joining Abu Ajis, Nadir Muhammad demanded that he first take back the city of Andijan in order to stop the princes and nobles in the court. This undoubtedly made Abu Ajis, who was not on good terms with his father, extremely unhappy.

However, as Haidar came to intercede with him several times, hoping that he would be able to send troops to rescue Andijan. The son of Andijan Burke always believed that the city of Andijan had not fallen, and that his father and the people of Andijan would hold out until reinforcements arrived. Of course, for the others, Haidar's words did not convince them, after all, the Yarkand almost captured the city of Namugan, how could it be possible to leave an Andijan city behind.

In addition, although the city of Margalang was abandoned by the Yarkands, the materials and residents in the city had long been moved away by the Yarkands, which means that the Bukhara army was an empty city without a fight, which made many people question why Haidar was able to escape alone in the first place. It's just that most of these doubts are in the middle and lower classes, and they haven't reached the ears of Abu Ajis.

However, after the scouts sent by Abu Aggis paid a great sacrifice, someone finally infiltrated the vicinity of Andijan City and brought back the news that Andijan City had not yet fallen. However, although the city of Andijan was not captured, it was also besieged by the Yarkand people outside the city by three fortifications, and even the Karadaria River passing north of the city of Andijan was blocked by two pontoon bridges.

Abu Aggis then believed that the city of Andijan had not fallen, and summoned the generals to discuss how to free the city. The generals of Kokand and Namgan were not very enthusiastic about rescuing Andijan, and being able to keep the Yarkand people east of Margalang was a goal for them.

Therefore, the generals of these two cities insisted that it would be better to wait for the arrival of the army of Nadir Muhammad. As for Andijan City, it has been supported for so many days, and it must not be a problem to hold out for a few more days.

Abu Aggis naturally knew that the so-called reinforcements would not arrive in a short period of time. If he fails to relieve the city of Andijan as soon as possible, it is estimated that Bukhara Khan will send others to preside over the war with the Yarkand Khanate. At such a critical moment, letting his father's political enemies take control of a large army is obviously asking for trouble for himself.

The change in Abu Aggis's attitude at the meeting suddenly gave Haidar an opportunity to perform, and he asked Abu Aggis to fight, willing to bring the 800 soldiers he had collected as the vanguard of the army, on the one hand, he could test the strength of the Yarkand people and whether there was an ambush; On the one hand, it can also warn the defenders of Andijan City, informing the residents of the city that reinforcements have arrived, so that when Abu Aggis's army arrives at the city, the Andijanians will go out of the city to cooperate with the Yarkands.

Abu Aguqis was so impressed by Haidar's suggestion that the prince praised Haidar's loyalty to the Khanate and announced that he would recruit 300 knights of the Guards to replenish Haidar's army, before asking if anyone opposed Haidar's claim.

After Abu Aggis took the lead, everyone naturally did not jump out to question Haidar again, and everyone praised Haidar's proposition, believing that as long as the Andijanians could go out of the city to flank the Yarkands, they would definitely be able to break the siege of Andijan this time.

Of course, many generals also considered that the Yarkand Khanate should be difficult to send reinforcements to support the heavy snow in winter, and even if the Andijanians did not go out of the city to cooperate, their army should not be much weaker than the Yarkand army, so they echoed the determination of the commander Abu Ajis.

The Bukhara army, which had been entrenched in the city of Margalang for more than half a month, finally set out in early December and marched towards the city of Andijan to the east. As the vanguard of the army, his 1,000-strong men and Yarkand rangers fought eleven times in five days, capturing more than 60 men and killing more than 100 men, opening the way for the army to reach Andijan.

On 11 December, the Abu Aggis army reached the south bank of the Karadaria River, ten miles southwest of the city of Andijan. As the largest city in the eastern part of the basin, the city of Andijan is located at the junction of two types of terrain. The eastern part of the city of Andijan is the so-called piedmont area, which is a transitional area from the mountainous terrain of the Fergana and Alai Mountains to the plateau and then to the plain.

As for the western part of Andijan, there are rivers, plains, woods and desert terrain. Although Abu Aggis chose to send troops to rescue Andijan, he did not immediately attack after arriving near the city of Andijan, but stayed in place for three days, while sending troops in turn to test the strength of the camp outside the city of Andijan; On the other hand, they sent people to carefully reconnaisrate the surrounding environment and determined that there were no Yarkand ambushes nearby.

On the morning of December 15, Abu Ajis set up an offensive position in front of the Yarkand camp, and Abu Aggis asked Haidar to lead the army of Namukan with about 2,000 men as his left flank, his own generals and the Kokand army of about 3,000 men as the central army, and he himself led more than 5,000 men to the right flank.

Abu Aggis did not trust the fighting power of the Kokand and Namgands, and he only hoped that these two forces would attract the attention of the enemy so that his main force could penetrate the stronghold and make contact with the Andijans. Abu Aegis thought he had ruled out all surprises, but soon after the war began, he realized that the biggest accident had always been around him.