Julius Caesar describes his invasion of Britain in 54BCE.
Gaius Julius Caesar invaded Britain twice – in 55 and 54BCE.
The first of these incursions was little more than a reconnaisance mission, which established a beachhead on the Kent coast but went no further. The second proved more enduring, resulting in the defeat of Cassivellaunus, and his replacement with the more Roman-friendly Mandubracius.
But having won a military victory, the Romans then left Britain. They would not return until 43AD, when Britain was incorporated into the Roman Empire. It would remain a colony of Rome until the last legions were withdrawn in 410AD.
This description of Britain was given by Julius Caesar in his account of the Gallic wars
See also Caesar’s description of Britain and Caesar’s account of the war and his departure from Britain.
Julius Caesar on Britain, 54BC
When these things were done [and] Labienus, left on the continent with three legions and 2,000 horse, to defend the harbors and provide corn, and discover what was going on in Gaul, and take measures according to the occasion and according to the circumstance; he himself, with five legions and a number of horse, equal to that which he was leaving on the continent, set sail at sun-set, and [though for a time] borne forward by a gentle south-west wind, he did not maintain his course, in consequence of the wind dying away about midnight, and being carried on too far by the tide, when the sun rose, espied Britain passed on his left. Then, again, following the change of tide, he urged on with the oars that he might make that part of the island in which he had discovered the preceding summer, that there was the best landing-place, and in this affair the spirit of our soldiers was very much to be extolled; for they with the transports and heavy ships, the labor of rowing not being [for a moment] discontinued, equaled the speed of the ships of war. All the ships reached Britain nearly at mid-day; nor was there seen a [single] enemy in that place, but, as Caesar afterward found from some prisoners, though large bodies of troops had assembled there, yet being alarmed by the great number of our ships, more than eight hundred of which, including the ships of the preceding year, and those private vessels which each had built for his own convenience, had appeared at one time, they had quitted the coast and concealed themselves among the higher points.
Caesar, having disembarked his army and chosen a convenient place for the camp, when he discovered from the prisoners in what part the forces of the enemy had lodged themselves, having left ten cohorts and 300 horse at the sea, to be a guard to the ships, hastens to the enemy, at the third watch, fearing the less for the ships, for this reason because he was leaving them fastened at anchor upon an even and open shore; and he placed Q. Atrius over the guard of the ships. He himself, having advanced by night about twelve miles, espied the forces of the enemy. They, advancing to the river with their cavalry and chariots from the higher ground, began to annoy our men and give battle. Being repulsed by our cavalry, they concealed themselves in woods, as they had secured a place admirably fortified by nature and by art, which, as it seemed, they had before prepared on account of a civil war; for all entrances to it were shut up by a great number of felled trees. They themselves rushed out of the woods to fight here and there, and prevented our men from entering their fortifications. But the soldiers of the seventh legion, having formed a testudo and thrown up a rampart against the fortification, took the place and drove them out of the woods, receiving only a few wounds. But Caesar forbade his men to pursue them in their flight any great distance; both because he was ignorant of the nature of the ground, and because, as a great part of the day was spent, he wished time to be left for the fortification of the camp.
The next day, early in the morning, he sent both foot-soldiers and horse in three divisions on an expedition to pursue those who had fled. These having advanced a little way, when already the rear [of the enemy] was in sight, some horse came to Caesar from Quintus Atrius, to report that the preceding night, a very great storm having arisen, almost all the ships were dashed to pieces and cast upon the shore, because neither the anchors and cables could resist, nor could the sailors and pilots sustain the violence of the storm; and thus great damage was received by that collision of the ships.
These things being known [to him], Caesar orders the legions and cavalry to be recalled and to cease from their march; he himself returns to the ships: he sees clearly before him almost the same things which he had heard of from the messengers and by letter, so that, about forty ships being lost, the remainder seemed capable of being repaired with much labor. Therefore he selects workmen from the legions, and orders others to be sent for from the continent; he writes to Labienus to build as many ships as he could with those legions which were with him. He himself, though the matter was one of great difficulty and labor, yet thought it to be most expedient for all the ships to be brought up on shore and joined with the camp by one fortification. In these matters he employed about ten days, the labor of the soldiers being unremitting even during the hours of night. The ships having been brought up on shore and the camp strongly fortified, he left the same forces as he did before as a guard for the ships; he sets out in person for the same place that he had returned from. When he had come thither, greater forces of the Britons had already assembled at that place, the chief command and management of the war having been intrusted to Cassivellaunus, whose territories a river, which is called the Thames, separates, from the maritime states at about eighty miles from the sea. At an earlier period perpetual wars had taken place between him and the other states; but, greatly alarmed by our arrival, the Britons had placed him over the whole war and the conduct of it.
Source: The Gallic Wars V, by Julius Caesar, translated by W. A. McDevitte and W. S. Bohn
Go to Part II of Caesars’s account of the invasion of Britain.