14. South-eastern Britain after Cæsar's Departure. B.C. 54—A.D. 43.—For nearly a century after Cæsar's departure Britain was left to itself. The Catuvellauni recovered the predominance which they had lost. Their chieftain, Cunobelin, the original of Shakspere's Cymbeline, is thought to have been a grandson of Cassivelaunus. He established his power over the Trinobantes as well as over his own people, and made Camulodunum, the modern Colchester, his headquarters. Other tribes submitted to him as they had submitted to his grandfather. The prosperity of the inhabitants of south-eastern Britain increased more rapidly than the prosperity of their ancestors had increased before Cæsar's invasion. Traders continued to flock over from Gaul, bringing with them a knowledge of the arts and refinements of civilised life, and those arts and refinements were far greater now that Gaul was under Roman rule than they had been when its Celtic tribes were still independent. Yet, in spite of the growth of trade, Britain was still a rude and barbarous country. Its exports were but cattle and hides, corn, slaves, and hunting dogs, together with a few dusky pearls.
15. The Roman Empire.—The Roman state was now a monarchy. The Emperor was the head of the army, as well as the head of the state. Though he was often a cruel oppressor of the wealthy personages who lived in Rome itself, and whose rivalry he feared, he, for the most part, sought to establish his power by giving justice to the provinces which had once been conquered by Rome, but were now admitted to share in the advantages of good government which the Empire had to give. One consequence of the conquest of nations by Rome was that there was now an end to cruel wars between hostile tribes. An army was stationed on the frontier of the Empire to defend it against barbarian attacks. In the interior the Roman peace, as it was called, prevailed, and there was hardly any need of soldiers to keep order and to maintain obedience.
16. The Invasion of Aulus Plautius. A.D. 43.—One question which each Emperor had to ask himself was whether he would attempt to enlarge the limits of the Empire or not. For a time each Emperor had resolved to be content with the frontier which Cæsar had left. There had consequently for many years been no thought of again invading Britain. At last the Emperor Claudius reversed this policy. There is reason to suppose that some of the British chiefs had made an attack upon the coasts of Gaul. However this may have been, Claudius in 43 sent Aulus Plautius against Togidumnus and Caratacus, the sons of Cunobelin, who were now ruling in their father's stead. Where one tribe has gained supremacy over others, it is always easy for a civilised power to gain allies amongst the tribes which have been subdued. Cæsar had overpowered Cassivelaunus by enlisting on his side the revolted Trinobantes, and Aulus Plautius now enlisted on his side the Regni, who dwelt in the present Sussex, and the Iceni, who dwelt in the present Norfolk and Suffolk. With their aid, Aulus Plautius, at the head of 40,000 men, defeated the sons of Cunobelin. Togidumnus was slain, and Caratacus driven into exile. The Romans then took possession of their lands, and, stepping into their place, established over the tribes chieftains who were now dependent on the Emperor instead of on Togidumnus and Caratacus. Claudius himself came for a brief visit to receive the congratulations of the army on the victory which his lieutenant had won. Aulus Plautius remained in Britain till 47. Before he left it the whole of the country to the south of a line drawn from the Wash to some point on the Severn had been subjugated. The mines of the Mendips and of the western peninsula were too tempting to be left unconquered, and it is probably their attraction which explains the extension of Roman power at so early a date over the hilly country in the west.
17. The Colony of Camulodunum.—In 47 Aulus Plautius was succeeded by Ostorius Scapula. He disarmed the tribes dwelling to the west of the Trent, whilst he attempted to establish the Roman authority more firmly over those whose territory lay to the east of that river. Amongst these later were the Iceni, who had been hitherto allowed to preserve their native government in dependence on the Roman power. The consequence was that they rose in arms. Ostorius overpowered them, and then sought to strengthen his hold upon the south-east of Britain by founding (51) a Roman colony at Camulodunum, which had formerly been the headquarters of Cunobelin. Roman settlers—for the most part discharged soldiers—established themselves in the new city, bringing with them all that belonged to Roman life with all its conveniences and luxuries. Roman temples, theatres, and baths quickly rose, and Ostorius might fairly expect that in Britain, as in Gaul, the native chiefs would learn to copy the easy life of the new citizens, and would settle their quarrels in Roman courts of law instead of taking arms on their own behalf.
18. The Conquests of Ostorius Scapula.—Ostorius, however, was soon involved in fresh troubles. Nothing is more difficult for a civilised power than to guard a frontier against barbarous tribes. Such tribes are accustomed to plunder one another, and they are quick to perceive that the order and peace which a civilised power establishes offers them a richer booty than is to be found elsewhere. The tribes beyond the line which Ostorius held were constantly breaking through to plunder the Roman territory, and he soon found that he must either allow the lands of Roman subjects to be plundered, or must carry war amongst the hostile tribes. He naturally chose the latter alternative, and the last years of his government were spent in wars with the Ordovices of Central Wales, and with the Silures of Southern Wales. The Silures were not only a most warlike people, but they were led by Caratacus, who had taken refuge with them after his defeat by Aulus Plautius in the east. The mountainous region which these two tribes defended made it difficult to subdue them, and though Caratacus was defeated (50), and ultimately captured and sent as a prisoner to Rome, Ostorius did not succeed in effectually mastering his hardy followers. The proof of his comparative failure lies in the fact that he established strong garrison towns along the frontier of the hilly region, which he would not have done unless he had considered it necessary to have a large number of soldiers ready to check any possible rising. At the northern end of the line was Deva (Chester), at the southern was Isca Silurum (Caerleon upon Usk) and in each of which was placed a whole legion, about 5,000 men. Between them was the smaller post of Uriconium, or more properly Viriconium (Wroxeter), the city of the Wrekin.