The great prestige gained by the Gaul War made people in Pompeii, Rome feel uneasy. In addition, in 53 BC, crassus, who crusaded in Pattaya, was defeated and died, and the political situation of Santou was unstable. The Senate took advantage of this situation to defeat Pompeii. In the first 49 years, the Senate issued a recall order to Caesar, ordering Caesar to return to Rome. Caesar replied that he hoped to extend the term of the governor of Gaul. The Senate not only refused, but also issued the Senate's final proposal, saying that if Caesar did not return to Rome immediately, he would declare Caesar an enemy of the country.

Caesar took the legion to the Rubicon River on the border. According to Roman law, no commander can cross the Rubicon River with his troops, or he will betray Rome. Caesar thought for a long time, and there is a famous saying, "After crossing the river, it will be a human tragedy; Not crossing the river is my own destruction. " So he took the legion across the Rubicon River. Caesar's actions shocked Pompeii, the Senate and faction members. They didn't expect Caesar to be so bold that he fled the Italian peninsula in a hurry with his belongings. Therefore, Caesar entered Rome without bloodshed and asked the rest of the Senate members to elect him dictator.

Then, he conquered Spain and Greece, completely defeated Pompeii in the Battle of salus in 48 BC, and pursued Pompeii to Egypt. In order to please Caesar, the Egyptians asked him to support the current king Ptolemy XIII. After Pompeii was assassinated, they presented Pompeii's head to Caesar. However, Caesar announced that the Egyptian throne would be shared by Ptolemy XIII and his sister Cleopatra. This angered the Egyptians and the Battle of Alexandria broke out. Caesar's sixth army struggled with the Egyptian army, and with the arrival of reinforcements, it completely defeated the Egyptian army. Ptolemy XIII was killed and Cleopatra bin Laden ascended the Egyptian throne. Regrettably, in the battle, the rockets fired by Caesar soldiers hit the great library in Alexandria, and more than 600,000 books were destroyed. After the Battle of Alexandria, Caesar and Cleopatra made a two-month trip to the Nile, and then conquered the capital kingdom that broke the contract with Rome. After the victory, he wrote a letter to the Senate with only three words, "Winnie ·VIDI·VICI" (I came, I saw, I conquered).

46 years ago, after Caesar returned to Rome, he once again called troops to attack the remnants of Pompeii, which fled to North Africa and formed an alliance with Jude, king of Numidia, and won a complete victory in the Battle of Tassos. After that, Caesar returned to Rome for a ten-day triumph.