In 1515 Sten Sture, the administrator of Sweden, supported by the Bishop of Linkoping as leader of the popular party, made a gallant attempt to rally his countrymen to shake off the Danish yoke. Unfortunately for the success of his undertaking he soon found a dangerous opponent in the person of Gustaf Trolle, Archbishop of Upsala, the nominee and supporter of the King of Denmark. The archbishop threw the whole weight of his influence into the scales of Denmark, and partly owing to his opposition, partly owing to the want of sufficient preparation the national uprising was crushed early in 1520. Christian II. was crowned King of Sweden by the Archbishop of Upsala. He signified his elevation to the throne by a general massacre of his opponents which lasted for two days, and during which many of the best blood of Sweden were put to death (Nov. 1520). The archbishop was rewarded for his services to Denmark by receiving an appointment as region or administrator of Sweden. He and his party made loud boast of their political victory, but had they been gifted with a little prudence and zeal they would have found good reason to regret a triumph that had been secured by committing the Church to the support of a Danish tyrant against the wishes of the majority who favoured national independence. Religion and patriotism were brought into serious conflict, and, given only a capable leader who would know how to conduct his campaign with skill, it was not difficult to foresee the results of such a conflict. As it happened, such a leader was at hand in the person of Gustaf Eriksson, better known as Gustavus Vasa. His father had been put to death in the massacre of Stockholm, and he himself when a youth had been given as a hostage to the King of Denmark. He made his escape and fled to Lubeck, where he was kindly received, and remained until an opportunity arose for his return to Sweden. He placed himself immediately at the head of the party willing to fight against Denmark, called upon his countrymen to rally to his standard, and in a short time succeeded in driving the Danish forces from Sweden. He was proclaimed administrator of his country in 1521, and two years later a national Diet assembled at Strengnas offered him the crown.