In August, 1521, Gustavus was elected administrator of Sweden, and was virtually ruler of the land, though the whole was not yet in his possession. The time of shifts, disguises, and humiliations was now over. The scenes of these, however, the barns where Gustavus threshed, the different spots where he was in the greatest peril—are still pointed out with veneration by the descendants of those peasants who succoured him in his adversity, and boasted that they were the first to help him to a crown.

In this juncture Christian saw himself obliged to send out yet more ships and men against Gustavus. To meet the re-enforced enemy, Vasa turned to Lübeck in 1522 and begged of "his fathers, brothers, friends, and dear neighbours of that town," under promise of eternal gratitude, to help him against "the tyrant," saying he would in his turn and time "accord to them milder privileges and everything that could be to their profit." The burghers decided to accede to this request; ten strong ships were armed to aid Gustavus Vasa and sent out to meet the Danish fleet.

Meanwhile they did not neglect to use the weapons of diplomacy; weapons so often successfully employed by them during their career. They remembered that Duke Frederick of Schleswig Holstein was uncle to Christian II., and that the two had ever been at feud. It occurred to them that it would be well to gain the duke as their ally, promising him the Danish throne in event of their victory; of course in return for important privileges; the Hansa would have been untrue to themselves and their traditional policy had they for one moment left out of sight their own advantages.

This proposal met with assent, and the consequence was that a powerful enemy was thus raised up in the centre of the king's dominions. Christian, following the counsel of Sigbrit, planned another wholesale massacre of the nobles whom he believed favourable to Frederick's cause. The matter got known, and in consequence a council was held by them in which they drew up a deed, renouncing their allegiance to Christian and choosing Frederick in his place to fill the Danish throne.

A question arose as to who should convey the perilous document to the king. A certain monk of Jutland offered to bear the ill tidings. He met the king as he was proceeding to one of his castles. Assuming an open and cheerful countenance he managed to get himself asked to dinner by the king, and continued to amuse him and divert all suspicions till the king retired to rest. Then, placing the despatch in one of his gloves, he left it on the table, went quietly out and escaped by a boat which he had ordered to be in readiness. A page who found the despatch next morning carried it to the king.

Christian, who till then had blustered and disbelieved in real danger, grew alarmed when he read this unexpected paper. He wrote to those who subscribed it saying "that he submitted himself to the emperor and other disinterested princes as his judges. As to the massacre at Stockholm, he would atone for it; he would fill the country with churches and monasteries, and undergo any penance which the Pope might impose. The Council and States should have from him fresh securities, if only they would retract their step and turn from him this dishonour they had meditated." The nobles replied that they acknowledged no tribunal superior to their own; that the king had perjured himself so often that they could not trust him; that he had confessed himself guilty, that the deeds by which he had freed them from their allegiance were known to all the world, and that they had chosen the Duke of Holstein as his successor.

And indeed Frederick, Duke of Holstein, was proclaimed king of Denmark in January, 1523. The Hansa fleet by sea, the support of the clergy and nobles by land—that clergy and those nobles whom Christian had oppressed—conduced to this result.

A manifesto put forth by Lübeck made known to the Emperor of Germany and the Empire how "the city after long patience and repeated prayers, in consideration of her oaths and duties towards the Holy Roman Empire and remembering the inevitable damage done to body, honour, and goods, had taken up arms to prosecute the wanton insurer and aggressor of the Holy Roman Empire."

This manifesto was one of the little farces the Hanseatic League loved to play with their supposed liege lord and sovereign, the Emperor of Germany, each time they took independent action and showed by deeds how little they heeded his authority or wishes.

In vain Christian, after his deposition, tried to rally his subjects around him. Fearing probably that revenge would be taken upon his person for his cruel massacres in Sweden, he decided that discretion was the better part of valour. Choosing twenty of his best and fastest ships, he placed on board of them all the State papers, all the gold and silver that had been hoarded in the public buildings, and the State jewels. On April 13, 1523, he, his wife and three children together with Sigbrit, "the last packed away in a chest with the treasures," quaintly writes a contemporary chronicler, went on board the largest of the vessels, whereupon they all set sail for the Netherlands. It was nothing more or less than flight, and an acknowledgment that Gustavus Vasa and his ally the Hansa, through its representative Lübeck had conquered; that the League, though declining in might, was still able, as in the most glorious times of its history, to play with kings like dice, deposing and installing them.