That winter Cæsar returned to northern Italy, leaving his legions in Gaul under the command of his lieutenants. In his winter retreat he enjoyed himself and spent enormous sums of money, listening eagerly to news of everything that had taken place in Rome since his departure.
In the following spring his friend and political partner, Crassus, was killed while engaging in battle with the Parthians in the east, leaving Pompey and Cæsar the only two men of first importance in Roman affairs. In that year also the Roman Senate prolonged Cæsar's rule of Gaul for five years more.
When spring came Cæsar led his legions from their winter encampments to battle against their enemies once more, and this time the victims of his skill were two German tribes who had again crossed over the Rhine to invade Gaul.
Cæsar routed them and chased them back across the Rhine, building a bridge to pursue them into Germany. Then he came back to Gaul, destroying his bridge behind him; and made his plans to invade the island of Britain, which is now England, Scotland and Wales. In Britain there lived tribes that were considered to hold the last extremity of the earth. Beyond them was nothing except mystery and darkness.
Boats were built by the Roman soldiers, who had been trained by Cæsar to turn their hand to any kind of labor, and the Roman army rowed across the English channel to the island where the warlike Britons awaited their coming. The Romans sprang from their boats into water up to their necks and waded ashore to battle, killing and capturing a large number of Britons, many of whom Cæsar took back with him into Gaul to adorn his triumphal entry into Rome when his term as governor of Gaul had come to an end.
The Roman Senate was astonished at Cæsar's success and all Rome rang with his fame. The island of Britain was held to be the last extreme that Roman arms could reach, and hitherto had been nothing but a place of fables and wild sea tales, and the Senate declared a thanksgiving in Cæsar's honor that was to last twenty days.
That winter Cæsar again returned to northern Italy, leaving his army under the command of his lieutenants, for, possessed of a great ambition to become the ruler of Rome, he desired to learn everything that was taking place there. His absence was taken by the Gauls as a sign that his power was weakening, and they considered that they had a splendid chance to revolt successfully and throw off the Roman power. And among them there sprang up a leader named Vercingetorix, who in his way was almost as great a genius as Cæsar himself, possessed of boundless courage and hardihood.
A revolt in Gaul at that time would endanger all Cæsar's chances for success in Rome. Should his army be overcome he would have no means of enforcing his power there, and a defeat would utterly destroy the prestige that he had built up among the Romans at the cost of so much money and labor. So Cæsar hurried across the Alps and after maneuvering his legions in a manner that showed to the world he was a genius in the art of war, he succeeded in surrounding the greater part of the forces of Vercingetorix.
To save his comrades Vercingetorix gave in to Cæsar, and galloped out of his stronghold to give up his sword. He laid his arms at Cæsar's feet and surrendered himself as a captive. Cæsar kept him as a prisoner for a number of years, after which time he was taken to Rome and forced to walk in the triumph of the conqueror. Then he suffered the fate of the captives of Rome. He was shut up in a dungeon and strangled, and his body was thrown upon one of the refuse heaps of the mighty city.
Continued success in Gaul had by this time made Cæsar's name so great in Rome that the Senate had grown to fear him. Pompey too was jealous of his growing power, and Cæsar was finally ordered by the Senate to disband his army. The two officers of the people, called the tribunes, whose names were Antony and Cassius, vetoed this act on the part of the Senate, and were hunted from Rome and fled to Cæsar's camp for refuge.