17. At length, when Vespasian received the possession of Britain together with the rest of the world, the great commanders and well-appointed armies which were sent over abated the confidence of the enemy; and Petilius Cerealis struck terror by an attack upon the Brigantes, [78] who are reputed to compose the most populous state in the whole province. Many battles were fought, some of them attended with much bloodshed; and the greater part of the Brigantes were either brought into subjection, or involved in the ravages of war. The conduct and reputation of Cerealis were so brilliant that they might have eclipsed the splendor of a successor; yet Julius Frontinus, [79] a truly great man, supported the arduous competition, as far as circumstances would permit. [80] He subdued the strong and warlike nation of the Silures, [81] in which expedition, besides the valor of the enemy, he had the difficulties of the country to struggle with. 18. Such was the state of Britain, and such had been the vicissitudes of warfare, when Agricola arrived in the middle of summer; [82] at a time when the Roman soldiers, supposing the expeditions of the year were concluded, were thinking of enjoying themselves without care, and the natives, of seizing the opportunity thus afforded them. Not long before his arrival, the Ordovices [83] had cut off almost an entire corps of cavalry stationed on their frontiers; and the inhabitants of the province being thrown into a state of anxious suspense by this beginning, inasmuch as war was what they wished for, either approved of the example, or waited to discover the disposition of the new governor. [84] The season was now far advanced, the troops dispersed through the country, and possessed with the idea of being suffered to remain inactive during the rest of the year; circumstances which tended to retard and discourage any military enterprise; so that it was generally thought most advisable to be contented with defending the suspected posts: yet Agricola determined to march out and meet the approaching danger. For this purpose, he drew together the detachments from the legions, [85] and a small body of auxiliaries; and when he perceived that the Ordovices would not venture to descend into the plain, he led an advanced party in person to the attack, in order to inspire the rest of his troops with equal ardor. The result of the action was almost the total extirpation of the Ordovices; when Agricola, sensible that renown must be followed up, and that the future events of the war would be determined by the first success, resolved to make an attempt upon the island Mona, from the occupation of which Paullinus had been summoned by the general rebellion of Britain, as before related. [86] The usual deficiency of an unforeseen expedition appearing in the want of transport vessels, the ability and resolution of the general were exerted to supply this defect. A select body of auxiliaries,