It was during the reign of Æthelred that the Danes first established themselves permanently in the country. In 867 Ingvar and Hubba, said to be the sons of Ragner Lodbrog, a great Scandinavian hero, invaded England. Legend says that this invasion was intended to exact vengeance for the death of their father, who had been cruelly put to death by Ella of Northumberland. There are chronological difficulties in the way of accepting this story, which are increased by the fact that the Danish landing was really in East Anglia. Thence, in 867, they advanced into Northumbria and took York. The anarchy in which Northumbria lay, caused by the rival claims of Osberht and Ella to the throne, rendered its conquest easy. In 868, they marched towards Mercia, and took Nottingham. Burhred, the King of Mercia, then implored the aid of Æthelred and his brother Alfred, who so far succeeded that they drove the Danes back to Northumbria. From thence, in 870, an invasion, under many leaders, whose connection is not very clear, was directed against East Anglia. They were there joined by Guthrum, another Danish leader, and their combined forces pressed victoriously onwards through Croyland, to Peterborough, Huntingdon, and Ely. After defeating the English at Thetford, they took Edmund, the Saxon King of East Anglia, prisoner, and, upon his refusal to accept the pagan religion, put him to death. For his constancy he was honoured with the title of Saint Edmund. East Anglia was thus completely in possession of the Danes, and Guthrum took to himself the title of king. East Anglia became henceforward for some time the principal point of Danish settlement in England. From thence the invaders passed into Wessex, under the command of Bagsecg and Halfdene. They were vigorously met by Æthelred. They pushed on, however, as far up the Thames as Reading, near which town a series of battles was fought,--at Englefield, where the Danes were beaten; at Reading, where the fortune of the day was changed; and subsequently at the great battle of Ashdown, where the victory of the English was regarded as being due to Alfred, who, being in command of half the army, attacked and defeated the enemy, while his brother was losing the precious moments in prayer for success. Though the victory of Ashdown was complete, it did not close the war. Almost immediately afterwards we hear of battles at Basing and at Merton, in which the Danes were again successful. These battles took place just before the death of Æthelred. [Sidenote: Alfred. 871-901.] [Sidenote: Treaty of Wedmore.]