The dastard emperor again bought them off with money and freedom to ravage Burgundy, Paris being finally rescued by Count Eudes. In 891 they were so thoroughly beaten by King Arnulf, of Germany, that their great leaders fell on the field and only a remnant of the Norsemen escaped alive, the waters of the river Dyle running red with the blood of slain thousands.
Gorm was one of the chiefs who took part in this disastrous battle of Louvaine and was one of the fortunate few who lived to return to their native land. Apparently it was not the last of his expeditions, his wife, Queen Thyra, taking care of the kingdom in his many long absences.
Thyra needed ability and resolution to fitly perform this duty, for those were restless and turbulent times, and the Germans made many incursions into Sleswick and Jutland and turned the borderlands on the Eyder into a desert. This grew so hard to bear that the wise queen devised a plan to prevent it. Gathering a great body of workmen from all parts of Denmark, she set them to building a wall of defense from forty-five to seventy-five feet high and eight miles long, crossing from water to water on the east and west. This great wall, since known as the Dannevirke, took three years to build. There were strong watch-towers at intervals and only one gate, and this was well protected by a wide and deep ditch, crossed by a bridge that could readily be removed.
For ages afterwards the Danes were grateful to Queen Thyra for this splendid wall of defense and sang her praises in their national hymns, while they told wonderful tales of her cleverness in ruling the land while her husband was far away. Fragments of Thyra's rampart still remain and its remains formed the groundwork of all the later border bulwarks of Denmark.
Queen Thyra, while a worshipper of the northern gods, showed much favor to the Christians and caused some of her children to be signed with the cross. But King Gorm was a fierce pagan and treated his Christian subjects so cruelly that he gained the name of the "Church's worm," being regarded as one who was constantly gnawing at the supports of the Church. Henry I. the Fowler, the great German emperor of that age, angry at this treatment of the Christians, sent word to Gorm that it must cease, and when he found that no heed was paid to his words he marched a large army to the Eyder, giving Gorm to understand that he must mend his ways or his kingdom would be overrun.
Gorm evidently feared the loss of his dominion, for from that time on he allowed the Archbishop of Bremen to preach in his dominions and to rebuild the churches which had been destroyed, while he permitted his son Harald, who favored the Christians, to be signed with the cross. But he kept to the faith of his forefathers, as did his son Knud, known as "Dan-Ast," or the "Danes'-joy."
The ancient sagas tell us that there was little love between Knud and Harald; and that Gorm, fearing ill results from this, swore an oath that he would put to death any one who attempted to kill his first-born son, or who should even tell him that Knud had died.
While Harald remained at home and aided his mother, Knud was of his father's fierce spirit and for years attended him on his viking expeditions. On one of these he was drowned, or rather was killed while bathing, by an arrow shot from one of his own ships. Gorm was absent at the time, and Thyra scarcely knew how the news could be told him without incurring the sworn penalty of death.
Finally she put herself and her attendants into deep mourning and hung the chief hall of the palace with the ashy-grey hangings used at the grave-feasts of Northmen of noble birth. Then, seating herself, she awaited Gorm's return. On entering the hall he was struck by these signs of mourning and by the silence and dejection of the queen, and broke out in an exclamation of dismay:
"My son, Knud, is dead!"