In the bitter feud between the Guelphs and the Ghibellines he found his opportunity. One of the rival emperors marched an army north to help the perjured priest. King Valdemar hastened to meet them, but on the eve of battle the Emperor was slain by one of his own men. On Sunday, when the archbishop was saying mass in the Bremen cathedral, an unknown knight, the visor of whose helmet was closed so that no one saw his face, strode up to the altar, and laying a papal bull before him, cried out that he was accursed, and under the ban of the church. The people fled, and forsaken by all, the wretched man turned once more to Rome in submission. But though the Pope forgave him on condition that he meddle no more with politics, war, or episcopal office, another summer found him wielding sword and lance against the man he hated, this time under the banner of the Guelphs. The Germans had made another onset on Denmark, but again King Valdemar defeated them. The bishop intrenched himself in Hamburg, and made a desperate resistance, but the King carried the city by storm. The beaten and hopeless man fled, and shut himself up in a cloister in Hanover, where daily and nightly he scourged himself for his sins. If it is true that “hell was fashioned by the souls that hated,” not all the penance of all the years must have availed to save him from the torments of the lost.

Denmark now had peace on its southern border. Dagmar was dead, and Valdemar, whose restless soul yearned for new worlds to conquer, turned toward the east where the wild Esthland tribes were guilty of even worse outrages than the Wends before Absalon tamed them. The dreadful cruelties practised by these pagans upon christian captives cried aloud to all civilized Europe, and Valdemar took the cross “for the honor of the Virgin Mary and the absolution of his sins,” and gathered a mighty fleet, the greatest ever assembled in Danish waters. With more than a thousand ships he sailed across the Baltic. The Pope sped them with his apostolic blessing, and took king and people into his especial care, forbidding any one to attack the country while they were away converting the heathen. Archbishop Anders led the crusade with the king. As the fleet approached the shore they saw it covered with an innumerable host of the enemy. So great was their multitude that the crusaders quailed before the peril of landing; but the archbishop put heart into them, and led the fleet in fervent prayer to the God of battle. Then they landed without hindrance.

There was an old stronghold there called Lyndanissa that had fallen into decay. The crusaders busied themselves for two days with building another and better fort. On the third day, being St. Vitus’ Day, they rested, fearing no harm. The Esthlanders had not troubled them. Some of their chiefs had even come in with an offer of surrender. They were willing to be converted, they said, and the priests were baptizing them after vespers, while the camp was making ready for the night, when suddenly the air was filled with the yells of countless savages. On every side they broke from the woods, where they had been gathering unsuspected, and overwhelmed the camp. The guards were hewn down, the outposts taken, and the King’s men were falling back in confusion, their standard lost, when Prince Vitislav of Rügen who had been camping with his men in a hollow between the sand-hills, out of the line of attack, threw himself between them and the Esthlanders, and gave the Danes time to form their lines.

In the twilight of the June evening the battle raged with great fury. With the King at their head, who had led them to victory on so many hard-fought fields, the Danes drove back their savage foes time after time, literally hewing their way through their ranks with sword and battle-axe. But they were hopelessly outnumbered. Their hearts misgave them as they saw ten heathen spring out of the ground for every one that was felled. The struggle grew fiercer as night came on. The Christians were fighting for life; defeat meant that they must perish to a man, by the sword or upon pagan altars; escape there was none. Upon the cliff overlooking the battle-field the archbishop and his priests were praying for success to the King’s arms. Tradition that has been busy with this great battle all through the ages tells how, while the aged bishop’s hands were raised toward heaven, victory leaned to the Danes; but when he grew tired, and let them fall, the heathen won forward, until the priests held up his hands and once more the tide of battle rolled back from the shore, and the Christian war-cry rose higher.

Suddenly, in the clash of steel upon steel and the wild tumult of the conflict, there arose a great and wondering cry “the banner! the banner! a miracle!” and Christian and pagan paused to listen. Out of the sky, as it seemed, over against the hill upon which the priests knelt, a blood-red banner with a great white cross was seen falling into the ranks of the Christian knights, and a voice resounded over the battle-field, “Bear this high, and victory shall be yours.” With the exultant cry, “For God and the King,” the crusaders seized it, and charged the foe. Terror-stricken, the Esthlanders wavered, then turned, and fled. The battle became a massacre. Thousands were slain. The chronicles say that the dead lay piled fathom-high on the field that ran red with blood. Upon it, when the pursuit was over, Valdemar knelt with his men, and they bowed their heads in thanksgiving, while the venerable archbishop gave praise to God for the victory.

That is the story of the Dannebrog which has been the flag of the Danes seven hundred years. Whether the archbishop had brought it with him intending to present it to King Valdemar, and threw it down among the fighting hordes in the moment of extreme peril, or whether, as some think, the Pope himself had sent it to the crusaders with a happy inspiration, the fact remains that it came to the Danes in this great battle, and on the very day which, fifty years before, had seen the fall of Arcona, and the end of idol-worship among the western Slavs. Three hundred years the standard flew over the Danes fighting on land and sea. Then it was lost in a campaign against the Holstein counts and, when recovered half a century later, was hung up in the cathedral at Slesvig, where gradually it fell to pieces. In the first half of the Nineteenth Century, when national feeling and national pride were at their lowest ebb, it was taken down with other moth-eaten old banners, one day when they were cleaning up, and somebody made a bonfire of them in the street. Such was the fate of “the flag that fell from heaven,” the sacred standard of the Danes. But it was not the end of it. The Dannebrog flies yet over the Denmark of the Valdemars, no longer great as then, it is true, nor master of its ancient foes; but the world salutes it with respect, for there was never blot of tyranny or treason upon it, and its sons own it with pride wherever they go.

King Valdemar knighted five and thirty of his brave men on the battle-field, and from that day the Order of the Dannebrog is said to date. It bears upon a white crusader’s cross the slogan of the great fight “For God and the King,” and on its reverse the date when it was won, “June 15, 1219.” The back of paganism was broken that day, and the conversion of all Esthland followed soon. King Valdemar built the castle he had begun before he sailed home, and called it Reval, after one of the neighboring tribes. The Russian city of that name grew up about it and about the church which Archbishop Anders reared. The Dannebrog became its arms, and its people call it to this day “the city of the Danes.”

Denmark was now at the height of her glory. Her flag flew over all the once hostile lands to the south and east, clear into Russia. The Baltic was a Danish inland sea. King Valdemar was named “Victor” with cause. His enemies feared him; his people adored him. In a single night foul treachery laid the whole splendid structure low. The King and young Valdemar, Dagmar’s son, with a small suite of retainers had spent the day hunting on the little island of Lyö. Count Henrik of Schwerin,—the Black Count they called him,—who had just returned from a pilgrimage to the Holy Land, was his guest. The count hated Valdemar bitterly for some real or fancied injury, but he hid his hatred under a friendly bearing and smooth speech. He brought the King gifts from the Holy Sepulchre, hunted with him, and was his friend. But by night, when the King and his son slept in their tent, unguarded, since no enemy was thought to be near, he fell upon them with his cutthroats, bound and gagged them despite their struggles, and gathering up all the valuables that lay around, to put the finishing touch upon his villainy, fled with his prisoners “in great haste and fear,” while the King’s men slept. When they awoke, and tried to follow, they found their ships scuttled. The count’s boat had been lying under sail all day, hidden in a sheltered cove, awaiting his summons.

Germany at last had the lion and its whelp in her grasp. In chains and fetters they were dragged from one dungeon to another. The traitors dared not trust them long in any city, however strong. The German Emperor shook his fist at Count Henrik, but secretly he was glad. He would have liked nothing better than to have the precious spoil in his own power. The Pope thundered in Rome and hurled his ban at the thugs. But the Black Count’s conscience was as swarthy as his countenance; and besides, had he not just been to the Holy Land, and thereby washed himself clean of all his sins, past and present?

Behind prison walls, comforted only by Dagmar’s son, sat the King, growing old and gray with anger and grief. Denmark lay prostrate under the sudden blow, while her enemies rose on every side. Day by day word came of outbreaks in the conquered provinces. The people did not know which way to turn; the strong hand that held the helm was gone, and the ship drifted, the prey of every ill wind. It was as if all that had been won by sixty years of victories and sacrifice fell away in one brief season. The forests filled with out-laws; neither peasant nor wayfarer, nor yet monk or nun in their quiet retreat, was safe from outrage; and pirates swarmed again in bay and sound, where for two generations there had been peace. The twice-perjured Bishop Valdemar left his cloister cell once more and girt on the sword, to take the kingdom he coveted by storm.