There was a fourth man of prominence, Cicero, the great scholar, philosopher, and orator. He prosecuted Verres, who, as governor of Sicily, had committed frightful excesses, and drove him from Rome. He prosecuted Catiline, who had made a conspiracy to seize the government, and even to burn Rome. The conspirators were foiled and Catiline killed. But Cicero, earnest and eloquent as he was, lacked manliness and courage, and was driven into exile by his enemies. There remained the three leaders, Pompey, Caesar, and Crassus, and these three made a secret compact to control the government, forming what became known as a _triumvirate_, or three man power. Pompey married Julia, the young and beautiful daughter of Caesar, and the two seemed very closely united. Caesar was elected consul, and in this position won public favor by proposing some highly popular laws. After his year as consul he was made governor of Gaul, and now began an extraordinary career. The man who had by turns shown himself a dissolute spendthrift, an orator, and a political leader, suddenly developed a new power, and proved himself one of the greatest soldiers the world has ever known. Gaul, as then known, had two divisions,--Cisalpine Gaul, or the Gaulish settlements in Northern Italy; and Transalpine Gaul, or Gaul beyond the Alps, including the present countries of France and Switzerland. In the latter country Rome possessed only a narrow strip of land, then known as the Province, since then known as the country of Provence. From this centre Caesar, with the small army under his command, consisting of three legions, entered upon a career of conquest which astonished Rome and drew upon him the eyes of the civilized world. He had hardly been appointed when he received word that the Helvetian tribes of Switzerland were advancing on Geneva, the northern outpost of the Province, with a view of invading the West. He hastened thither, met and defeated them, killed a vast multitude, and drove the remnant back to their own country. Then, invited by some northern tribes, he attacked a great German band which had invaded Northern Gaul, and defeated them so utterly that few escaped across the Rhine. From that point he made his way into and conquered Belgium. In a year's time he had vastly extended the Roman dominion in the West. For nine years this career of conquest continued. The barbarian Gauls proved fierce and valiant soldiers, but at the end of that time they had been completely subdued and made passive subjects of Rome. Caesar even crossed the sea into Britain, and look the first step towards the conquest of that island, of which Rome had barely heard before.