Caesar and Crassus, the two leaders of the democratic party at Rome, now joined with Pompey in what is called the First Triumvirate. To this "ring" Pompey contributed his military reputation, Crassus, his wealth, and Caesar, his influence over the Roman mob. Supported both by the people and by the army, these three men were really masters of Rome. An immediate result of the First Triumvirate was the appointment of Caesar as governor of Cisalpine and Transalpine Gaul. [Illustration: GAIUS JULIUS CAESAR (British Museum, London)] CAESAR'S CAMPAIGNS IN GAUL, 58-50 B.C. The story of his career in Gaul has been related by Caesar himself in the famous _Commentaries_. This book describes a series of military successes which have given the author a place among the world's generals. Caesar overran Transalpine Gaul, twice bridged the Rhine and invaded Germany, made two expeditions to Britain, and brought within the Roman dominions all the territory bounded by the Pyrenees, the Alps, the Rhine, and the Atlantic Ocean. ROMANIZATION OF GAUL Caesar's conquests in Gaul are more than a chapter in the history of the art of war. They belong to the history of civilization. Henceforth the frontier of prehistoric Europe retreated rapidly to the north. The map of the ancient civilized world widened from the Mediterranean basin to the shores of the Atlantic. Into the conquered lands came the Latin language, the Roman law, and the customs and institutions of Rome. Gaul speedily became one of the most flourishing parts of the Roman world. "Let the Alps sink," exclaimed Cicero, "the gods raised them to shelter Italy from the barbarians, but now they are no longer needed." DEFEAT AND DEATH OF CRASSUS, 53 B.C. During Caesar's long absence in Gaul the First Triumvirate was suddenly ended by the death of one of its members. It had been a part of their bargain in dividing the Roman world that Crassus should have the government of Syria. But this unlucky general, while aspiring to rival Caesar's exploits by new conquests beyond the Euphrates, lost his army and his life in battle with the Parthians. Besides checking the extension of the Roman arms in the remote East, the disaster had its effect on Roman politics. It dissolved the triumvirate and prepared the way for that rivalry between Caesar and Pompey which formed the next step in the downward course of the republic. GROWING OPPOSITION BETWEEN POMPEY AND CAESAR The two men were now rapidly drawing apart. Pompey grew more and more jealous of Caesar and more and more fearful that the latter was aiming at despotic power. He himself had no desire to be king or dictator. He was equally determined that Caesar should not gain such a position. In this attitude he had the full support of Cicero and the other members of the Senate. They saw clearly that the real danger to the state was Caesar, not Pompey. CAESAR DECLARES WAR IN THE REPUBLIC, 49 B.C.