Over the winter he counted about 600 transports and 28 warships built by the soldiers, and ordered the fleet to gather at Portus Itius, the port with the shortest crossing to Britain. (Caesar, Commentaries on the Gallic War 5.2)
Among the rival leaders in the land of the Treveri, Indutiomarus and Cingetorix, Caesar made Indutiomarus hand over 200 hostages and reconciled the two factions. (Caesar, Commentaries on the Gallic War 5.4)
Held up for about 25 days at Portus Itius by north winds, Caesar tried to curb the restless movements of Dumnorix, whom he meant to take from Gaul as a hostage. (Caesar, Commentaries on the Gallic War 5.7)
He left Labienus on the Continent with three legions and 2,000 cavalry; he himself sailed at dusk with five legions and the same number of horse. The wind died and the tide carried them off; Britain was seen on the left, and they rowed in and landed. (Caesar, Commentaries on the Gallic War 5.8)
After landing, at night he marched about 12 miles and at a river beat back British cavalry and chariots; the next day he received word that a storm had wrecked most of the ships at anchor. (Caesar, Commentaries on the Gallic War 5.10)
British cavalry and charioteers fought the marching Roman horse and were chased into the woods; while the Romans were building camp, they burst out of the woods again and attacked the sentries. (Caesar, Commentaries on the Gallic War 5.15)
Caesar marched into the land of Cassivellaunus and reached the Thames; facing the enemy's stake defenses, his soldiers crossed with only their heads above water and drove the enemy off. (Caesar, Commentaries on the Gallic War 5.18)
The Trinovantes submitted to ask protection for Mandubracius; Caesar took 40 hostages and grain, and sent him back to rule them. (Caesar, Commentaries on the Gallic War 5.20)
Cassivellaunus had the four kings of Kent attack the fleet camp, but Roman troops sortied and captured Lugotorix; thereupon Cassivellaunus asked for peace. (Caesar, Commentaries on the Gallic War 5.22)
After drawing the ships up on the shore, Caesar held a Gallic council at Samarobriva; because of the poor harvest he spread the legions among many tribes for winter quarters, unlike usual. (Caesar, Commentaries on the Gallic War 5.24)