The momentum between the two sides was unprecedented, and the result was like the western front of World War I, except that the stalemate did not last for five years, but lasted for five centuries. Once the front of the two empires was consolidated by Hadrian, it was basically fixed. The city is besieged, occupied, lost and occupied. A Roman emperor even became a prisoner of war, but neither side gained any obvious advantage. This conflict is sometimes regarded as the cause of the demise of the Western Roman Empire, because this small border area absorbed the best Roman troops and often did not crush them. Then, after five thousand years of stalemate, Sassanians began to gain the upper hand.
Since 602, Sassanians have occupied Asia Minor and sent amphibious troops to occupy Cyprus. When the Romans fought back, they were completely defeated. Rome's messenger of peace was detained and then executed. By 622, only the Bosphorus was located between Sassanian and Constantinople. To make matters worse, Awa nomads attacked the Balkans from the west. The situation is very critical.
However, the time has come and people have arrived. In 608 AD, the general of Rome and North Africa, Ed heraclius, came to power. After his failure, he began to try to save his empire. He cut spending, increased taxes, bought Avas, reorganized the army, and called on all devout Christians to defend Byzantium.
Heraclius fought back, but the Romans could only send one army, and he couldn't stop Constantinople from being surrounded. Heraclio continued to advance to Asia Minor in the winter campaign. Constantinople was saved, but Sassanian's allies abandoned them. Heraclius won a decisive victory in the Battle of Nineveh in 627. The Sassanian dynasty fell into civil war, that's all. The longest conflict in Rome is over. Hera Criou brought the real cross back to Jerusalem and was called "New Scipio".
If the historical results were slightly different, heraclius might be considered as one of the greatest Roman emperors of all time. He won the last great war in ancient times. He saved the defeat of the empire and defeated the most tenacious enemy of the Romans. However, Heraclio's victory was not only not worth the loss, but also meaningless. The empire went bankrupt, the Avars occupied the Balkans, the newly occupied territory was disloyal to Constantinople, and the region was destroyed by the war.
However, worse things are happening. The "human tsunami" conquered by the allied forces will soon engulf this area, sweep the last Sassanians and repel the Romans. Ten years after the Battle of Nineveh, Jerusalem was occupied by Muslims. In less than a century, they surrounded Constantinople.
Therefore, heraclius is not regarded as the greatest Roman general since Caesar, but as the most meaningless war in ancient history. For those who study military tactics, this conflict is an interesting example of the exchange of weapons and tactics between the two sides in the continuous arms race, but for historians who study the late Roman Empire, the whole incident is mostly frustrating and difficult to think about.