The first landing-place of the Jutish allies of the Britons was in the Isle of Thanet, separated at that time by a considerable inlet from the British mainland. Their aid enabled the Britons to drive back the Pictish invaders. But their success, and the settlement they had formed, enticed many of their brethren to join them, and their numbers were constantly increasing. Increase of numbers implied increased demand in the way of payment and provisions. Quarrels arose between the new-comers and their British allies. War was determined on. The inlet which divided Thanet from the mainland was passed, and at Aylesford, on the Medway, a battle was fought, which, though it cost Horsa his life, put the conquering Barbarians into possession of much of the east of Kent. The victory was followed by the extermination of the inhabitants; against the clergy especially the anger of the conquerors was directed. The country was thus cleared of the inhabitants, and the new-comers settled down, bringing with them their goods and families and national institutions. This process was repeated at every stage of the conquest of the country, which thus became not only a conquest but a re-settlement. The Jutish conquest of Kent was followed, in 477, by an invasion of the Saxons, who, under Ella, overran the south of Sussex, and captured the fortress of Anderida near Pevensey; and in 495, by a fresh Saxon invasion under Cerdic and Cymric, who passed up the Southampton water and established the kingdom of the West Saxons. A momentary check was given to the advance of the conquerors, in 520, at the battle of Mount Badon. But almost immediately fresh hordes of Angles began conquering and settling the East of England, where they established the East Anglian kingdom, with its two great divisions of Northfolk and Southfolk. Between that time and 577, the date of a victory at Deorham, in Gloucestershire, the West Saxons had overrun what are now Hampshire and Wiltshire, Oxfordshire, Berkshire, and the valley of the Severn, reaching almost as far as Chester; while the Angles, entering the Humber and working up the rivers, established themselves on the Trent, where they were known as Mercians or Border men, and formed two Northern kingdoms, that of Deira in Yorkshire, and that of Bernicia, extending as far as the Forth. The capital of this last-named kingdom was Bamborough, founded by Ida, and called after his wife Bebba, Bebbanburgh, or Bamborough.