After Murad IV returned to Istanbul, he calmly recounted his experience to the Empress Dowager, who was surprised that the Empress Dowager agreed with him very much, and even praised him for his assertiveness and made him ready for the official succession.

Murad IV was ambitious and began to study while having people translate the books he had brought with him from Zhu Changrun. He planned to study the Analects of Confucius first, and then look at the remarks of the hundred schools of thought, hoping to find out the solution to the most prominent problem of ethnic conflict in the Ottoman Empire.

There are really not many Ottomans who really belong to the Turkic lineage, at least not the most in the huge empire, and they mainly live around Istanbul, he found a saying from Mencius called "Do not do to others what you do not want to do to yourself", and then from the Ottoman own collection, he found that the Ottoman Emperor admonished before his death, "Be just, merciful, cherish scholars, and protect the people", reflect on the current ethnic policy of the Ottoman Empire, and resolve to start from solving the contradictions between individual nationalities, and begin to change the ethnic policy in various places, There are also many unequal tax regulations.

Just when Murad IV was preparing to make a big move, something happened on the Western Front, because the war with the Safavid Dynasty consumed a lot of financial resources, and a large number of troops were recruited from all over the country, and now it is still confronting the Safavids, and the troops have not shrunk in the central region, the Kingdom of Hungary and the Kingdom of Austria took the opportunity to encourage Serbia to rebel again, and the Kingdom of Hungary also sent troops to assist, and the Greek Federation also joined the rebellion, and in a short time, the Ottoman Empire fell into a state of civil strife.

In order to deal with the chaotic situation, Murad IV discussed with the Queen Mother, and the Queen Mother personally went to the Greek Federation to divide and unite the various city-states in Greece, pull some city-states close to the Queen Mother's family, give them more favorable treatment, and then promise them tax cuts and equality policies, and strike at other city-states that were extremely hostile to the Ottoman Empire, and let them start a mess on their own first, without affecting the northern front to deal with the battlefield of the Kingdom of Hungary.

For the Kingdom of Serbia, Murad IV personally issued a letter of appointment, abolished the position of king, and appointed his younger brother, the second son who studied at the Istanbul Military Academy, as the king of Serbia, armed him and told him to quickly put down the rebellion.

On the diplomatic front, Murad IV finally recognized the land-for-arms agreement signed by the governor who had been fooled by Sheikh Khalid, and officially used the seal of the Ottoman Empire, established close relations with the Fengyang Kingdom, and purchased a large number of weapons again. Although Murad IV was reluctant to admit this agreement, but the form was not up to anyone, through the conversation with Zhu Changrun, he understood how powerful the Ming Empire behind the Fengyang Kingdom was, since the Ming Empire planned to acquire this land, it was impossible to spit out what had been swallowed, and at present, Zhu Changrun was very friendly to help him, so he used the governor as a scapegoat and let the members of the Khalid family divide his fiefdom.

The weapons purchased from the Fengyang Kingdom were handed over to the Khalid family, and they were asked to organize tens of thousands of troops, and as the newly crowned Serbian king entered the territory of Serbia, the new king entered Serbia and announced that from now on, all Serb ethnic groups would enjoy the treatment of Ottoman civilians, and Murad IV would thoroughly implement the "just and benevolent" policy formulated by Ottoman the Magnificent, and all the original unequal policies were not formulated by His Majesty the King, but by the Serbian King himself, and it was his own insatiable greed, In order to grab more wealth for his own enjoyment, now Murad IV has found this unequal, unjust, and unkind act that has hurt everyone's hearts, so he deposed him from the throne and hoped that everyone would work together to eliminate chaos and rebuild their homeland.

The new king brought preferential policies, and also brought a strong armed force, first rushed into the capital of the kingdom at absolute speed, arrested the old king, and then promulgated the preferential policies to the whole country, attacking the heart and showing off the military at the same time, and soon the situation was brought under control. Murad IV skillfully used the word chaos rather than rebellion to reassure the inhabitants, the situation gradually assessed, and the army of the Kingdom of Austria was kept out of the borders, and there was no way to unite the rebel forces, and the common people did not care who was the king, but who could make their lives stable.

In the face of the turmoil of the Kingdom of Hungary, through the relationship of Zhu Changrun, Murad IV once again handed an olive branch to Li Hongji of the Dashun Marquis, and handed over the land on the right bank of the Dnieper River to Li Hongji in the form of a contract from the mouth of the Dnieper River to Shunhe City, so that Li Hongji's Dashun Marquis could rightfully accept the land that originally belonged to the Ottoman Empire. In exchange, Li Hongji needed to contain the power of the Tsarist Empire, and also had to pay the Ottoman Empire 500 light mortars.

Li Hongji also received Zhu Youxiao's will to help the Ottoman Empire as much as possible under the condition of ensuring his own safety, so that they could become the front line against the Europeans, and also asked Hong Chengchou to send a large number of weapons to Li Hongji, so that he could transport them directly to the port of Kajibey by ship to arm the Ottoman troops stationed in Wallachia, and they were to send troops directly from Wallachia to wage war against the Kingdom of Hungary.

100,000 Ottoman soldiers through simple training, the weapons they got from Li Hongji were equipped, in addition to 500 light mortars, there were also 50,000 firing guns, mortars were given to the Ottoman Empire, five base shells were also free, but 50,000 firing guns were not given for free, Li Hongji also made a lot of money in this business. These 50,000 firing rifles can completely suppress the flintlock pistols of the Hungarian army, whether it is firing distance or firing speed, they can completely beat the flintlock pistol, and better is that they are not afraid of rainy weather and can fight around the clock.

Armed with firing rifles and light mortars, the Ottoman army was also veterans of the Russian Empire for a long time, and with the new weapons, it was sure to be strengthened. They crossed the Kingdom of Wallachia and headed straight for Budapest, which is now two cities that had been conquered by the Ottomans and then taken by the Habsburgs.

An army of 100,000 men arrived, and Budapest, which had been devastated by war, had not yet built its walls, and could not stop the Ottoman army, so it fled to Vienna in panic. Khalid, the old patriarch of the Khalid family, who happened to be in the Kingdom of Serbia, had not yet returned with his army, so the two sides merged into one and besieged the city of Vienna.

The Habsburgs were very powerful in Europe, they had ruled many countries, and after the Ottoman siege of Vienna, they organized resistance in Vienna on the one hand, and on the other hand, they called on their own clans to come to their aid, such as Bohemians, Saxons, Dawei themselves, Bavarians, and even Poles to help defend the city.

The sheer number of troops soon outnumbered the Ottoman army, and such a large number of troops almost discouraged the governor of the Ottoman army besieging Vienna. If it is a siege battle, the other side has so many troops, and it is understandable to be the defender, but now it is attacking the city by itself, and there are not many people in the city, but there are many people outside? Vienna was surrounded on three sides by walls, and on the westernmost part of the city was a moat with a natural barrier, and the bridge had been demolished before the Turkish army came, so even if it broke into the city with strong artillery fire in a short time, it would have to be besieged by an exponential army from outside, and the governor wanted to withdraw for a while.

Chief Khalid appeared at this time, wandering in the Fengyang Kingdom for a long time, he admired Mao Bijiang's military talent very much, and learned military knowledge from Mao Bijiang when he was idle, including watching Mao Bijiang's military training. One of them was the use of the classic battle methods against the large number of Tsarist Empires in military exercises, when the light mortar in the nameless town of Mao Wenlong charged with cavalry and defeated the Tsarist Imperial army in one fell swoop, which became a textbook subject of the Daming Military Academy.

Chief Khalid proposed this tactic to the governor through the old patriarch, and the governor looked at Chief Khalid with straight eyes, could this small cannon still be put on horseback, why do you feel a little unreliable, if the war horse is frightened and he messes up first, wouldn't it be a mess? But do you have a more clever tactical approach? No matter what, anyway, I am not sure that I will win this battle, why not let this guy try, if he succeeds, it is his own credit, and if he fails, even if he makes people unknown, the guilt can be reduced, and the gamble will be forgotten.