Al-Mansur was a man of a generation, and within a month of his return to Baghdad he had subdued the 50,000 Guards remaining in Baghdad and the 10,000 garrisons in Persia. Of course, the ministers, nobles, and tribal chieftains controlled by Western Qin were secretly contributing, otherwise Mansur, no matter how strong his ability was, would not have been able to take over most of the garrisons, officials, ministers, and generals in Baghdad and Persia in such a short period of time.

For those disobedient ministers and generals, Mansur used thunderous means to suppress and humanely destroy, and even the somewhat hesitant attitude of Vizier Khalid was poisoned by him with a glass of poisoned wine.

For a time, the attitude of the tribal chiefs in the valley of the two rivers and the Arabian Peninsula became uncertain, even General Attis in northern Syria, who did not express their support for either Mansour or Mahdi, and both father and son sent to contact General Attis and the tribal chiefs in various places, but those who were sent soon returned without a clear answer.

The situation is very strange, and Artis and the tribal chiefs everywhere obviously do not want to wade into this troubled water, and remain neutral, and not supporting any side is their current attitude.

In the Dome of the Rock in Jerusalem, Mahdi burst into a rage: "These guys who see the wind and steer the rudder hide when they see that the wind is not right, and even Artis is the same, and I trust him so much in him, let him be alone, and he treats me like this, how hateful it is!" ”

One of the ministers stood up and said, "Chiefs of the believers, it is normal for these people to be shrunken turtles, but now we are glad that they did not side with your father, and I personally think that they will not say anything until you and your father have decided the winner!" ”

A minister walked in from outside the door and said to Mahdi: "Chiefs of the believers, your father has sent his will to send you to Baghdad to meet you!" ”

This news is not clear to Mahdi, so that his body involuntarily trembled a few times, it is really the shadow that this father gave him is too deep, everyone present understands that Mansour is Mahdi's father, and now he has ordered Mahdi to go to Baghdad to meet him in the name of his father and the caliphate, if Mahdi does not go, he will rebel, he will inevitably be in a disadvantageous position politically, his reputation will be greatly damaged, and the followers who follow him will no longer have a sense of trust in him.

When the real test came, Mahdi was a little anxious, he looked at the ministers and generals present, and asked, "You say, what should I do?" Should you go to Baghdad, or stay in Jerusalem? ”

One of the ministers stood up and said: "Commanders of the faithful, you must not go to Baghdad, if you go to Baghdad, life and death will not be up to you, and the brothers you defeated and imprisoned have now been released by your father, and they are still in important positions in Baghdad, and some even control the army, once you enter the confines of Baghdad, they will inevitably attack you with a grudge, so you must not go!" ”

Mahdi frowned and said: "But my father summoned me to Baghdad to meet me, and if I don't go, Baghdad will have reason to declare me a rebellion, we will be politically disadvantaged, my prestige will be greatly reduced, and the believers and people will no longer trust me!" ”

A minister who rarely spoke stood up and said: "If the ruler of the believers does not want to go to Baghdad, then we can no longer stay in Jerusalem!" ”

Mahdi frowned: "Why? ”

"As you said just now, if you don't go to Baghdad to see your father, you will be at a political disadvantage, and Baghdad will have a reason to declare you rebelling, and if you dare not go to Baghdad for fear of encountering accidents, then we must find a way to redeem our political defeat so that Baghdad will not find a reason to attack you politically!"

A minister next to him asked suspiciously, "What does this have to do with our inability to stay in Jerusalem?" ”

The vizier said, "Of course it does, because I have thought of a way to reverse our political disadvantage, provided that we leave Jerusalem!" ”

Mahdi immediately asked, "What way?" ”

The official said, "You can send someone to announce the relocation of the capital to the entire world under Allah!" After all, your father is only the former caliph, and he was once captured by Western Qin, and he stayed in Western Qin for three years, his prestige is long gone, and even if he comes back now, he is not right! Can a caliph who has been captured by the enemy still be Allah's agent on earth? And you are a caliph who has officially ascended the throne, why does he dictate to you? He only relies on the fact that he is your father, as long as you announce the relocation of the capital to everyone as a caliph, it is equivalent to announcing to everyone that you are the caliph, and the existence of Baghdad will be illegal, and their position will be very embarrassing! ”

"That's right, that's right!" Mahdi was overjoyed, and he didn't expect it to be a turning point, so he immediately asked: "Then where do you think it is most appropriate to move the capital?" Why can't the capital be made in Jerusalem? ”

"O Commander of the believers, has Jerusalem not only been a holy place, but also a sign of Allah and a pagan place, and no caliph has made it their capital before. They must have thought about it, but they also knew that it was not appropriate, and that if Jerusalem was to be made the capital, it would be opposed not only by the infidels but also by the believers! The only territory we can govern now is Damascus, which is the most suitable as the capital, and the previous caliphs have set up their capital in Damascus, so moving the capital to Damascus is the best choice! ”

With a frightening glint in his eyes, Mahdi thought for a while and said, "Okay, then send someone to announce my decision to all the tribes and all the people in the world - move the capital to Damascus!" At the same time, it was announced that Baghdad would be left to my father, the former caliph, and that the Guards and all other officials in Baghdad should be ordered to go to Damascus and appoint my father as the emir of Baghdad to garrison Baghdad".

Mahdi's move is not unwise, not only to defuse this political crisis, but also to declare to everyone that he is the current caliph, and only he has the right to dictate to the whole world, you see, I can even appoint my father to an official position, I am the agent of Allah on earth.

Mansour didn't expect his son to have such political wisdom, and it only took one capital move to break the trap he set, but he obviously wouldn't give up, and the father and son began to wrestle and fight, which lasted for two years. Political offensives were launched at times, and military clashes were frequent, mainly in eastern Palestine (present-day Jordan), where each side won and lost several battles, with no one taking advantage.

During this time, the Eastern Roman Empire waged two wars against the Bolgar Khanate in the north, both of which were initiated by Constantine V, who thought that his time was running out and that he had to complete the feat of quelling the barbarian invasion in the north in his lifetime, and both wars achieved good results.

After a brief period of chaos in the Bolgar Khanate, a new king appeared, and he was Telilig!

After he came to power, he organized an attack on the Thrace region of the Eastern Roman Empire, but his plan was betrayed by his own people, he led his army to attack the Eastern Roman Empire on the way to attack the Eastern Roman Empire, the army suffered heavy casualties, although he tried his best to escape, but tens of thousands of soldiers were annihilated, a large number of Bolgar warriors were captured by the army of the Eastern Roman Empire, and these Bolgar captives were all sent to the arena of Constantinople to be executed, Their heads were hung from the walls of Constantinople.

Constantine V's successive victories against the Bolgar Khanate earned him the title of the first "Butcher of Bulgaria", but these military attacks were mainly carried out by Leo's army, so Leo gained the support of the army.

During these two years, the Frankish king Charman in Western Europe was expanding his territory in a big way, and since the sudden death of his brother Carloman in 771 AD, he became the only monarch of the entire Frankish kingdom, he expelled his brother's widow and his nephew, took over his brother Carloman's kingdom, and unified the Franks.

Carloman's widow and children fled to Italy and took refuge in the Lombard kingdom in northern Italy, where King Charman, fearing that they would be held hostage and overthrown, attacked the Lombard kingdom in northern Italy in 774 AD. In this battle, the Lombardy kingdom was defeated, and the Lombard kingdom in northern Italy was soon annexed to the Frankish kingdom, and his brother and nephew were captured by him and never seen again, and it is suspected that they had been exterminated by Charleman.

After the destruction of the Lombard kingdom in northern Italy, Charlemagne's conquest did not stop, and instead of marching into southern Italy, which belonged to the Eastern Roman Empire, he attacked the Saxons in a vast area of northern Germany.

In 775 AD, the Eastern Roman Emperor Constantine V's illness worsened, and in September, Constantine V was unconscious, and on September 14, a generation of emperors Constantine V died of illness! Leo then enthroned himself in Constantinople with the support of his army, and was called Leo IV!

After Leo IV ascended the throne, several of his brothers were quite dissatisfied with his accession to the throne, and they launched rebellions in several places, Leo IV used thunderous means, commanded a large army to quickly quell these rebellions, and killed these half-brothers, and completely sat on the throne.