Suetonius Paulinus, who was despatched to Britain by Nero in 58, proved himself fully equal to the task he had undertaken. Hitherto the Britons had been excited to revolt by the exhortations of the Druids, whose principal sanctuary was in the island of Anglesea, which, up to the period of his government, had preserved its independence, and served as a refuge to the malcontents and vanquished. Of this important spot Suetonius resolved to obtain possession, as the most effectual means of crushing the spirit of resistance still existing amongst the people. By means of a number of flat-bottomed boats, which he had constructed for the purpose, he crossed the arm of the sea which separates Anglesea from Britain. Tacitus has left a vivid description of the effect produced upon the Romans on approaching the island: the army of the enemy drawn up like a living rampart on the shore, to oppose their landing; the women, in mournful robes of a sombre colour, rushing wildly along the sands, brandishing their torches and muttering imprecations; the Druids, with their arms extended in malediction. The invaders were appalled; and, but for the exhortations of their leaders, the expedition, in all probability, must have suffered a defeat. Excited by their reproaches, the standard-bearers advanced, and the army, ashamed to desert their eagles, followed them, striking madly with their swords, and crushing all who opposed them. Finally, they succeeded in surrounding the Britons, who perished, with their wives and children, in the fires which the Druids had commanded to be kindled for their hideous sacrifices. The victory was a terrible blow to the influence of the Druids, who never recovered their power in the island; and its consequences would have been even more severely felt, but for an insurrection which shortly afterwards broke out in that portion of Britain which had been reduced to the condition of a Roman colony.
The imposts were excessive, and exacted with rigour. Hundreds of distinguished families saw themselves reduced to indigence, and, consequently, to servitude. Their sons were torn from their hearths, and compelled to serve on the continent in the auxiliary cohorts. All these evils, great as they were, might have been borne, had not an outrage been added more infamous than any the insolent invaders had yet ventured to perpetrate: an outrage which filled the hearts of the Britons with fury, and drove them once more to rebellion. Prasutagus, a king of the nation of the Iceni, had for many years been the faithful ally of Rome; on his death, the better to ensure a portion of his inheritance to his family, he named the emperor and his daughters as his joint heirs. The Roman procurator, however, took possession of the whole in the name of his imperial master, a proceeding which naturally aroused the indignation of Boadicea, the widow of the deceased prince. Being a woman of resolute character, she complained bitterly of the spoliation, and for redress was not only beaten with rods like a slave, but her daughters were dishonoured before her eyes. On hearing of these indignities, the Iceni flew to arms; the Trinobantes and several other tribes followed their example, and a league was formed between them to recover their lost liberties.