This law provided that whenever a king was to be chosen, each provincial magistrate, with the assent of all landowners in his province, should select twelve men, who on a day appointed were to meet in general diet with all the magistrates, and choose the king. Unhappily this law was never followed, though the king by whom it was enacted struggled hard to maintain the people's rights. In 1359, after a series of internal disorders, his Cabinet compelled him to call a meeting of all the magnates in the realm; but in addition to the magnates he summoned also delegates from the peasantry and burghers, evidently with a view to gain their aid in curbing the insolence of the Cabinet. This was the second general diet. From this time forth the king did all he could to strengthen the people, until at last he banished a number of his chief opponents. They thereupon, in 1363, offered the crown to Albert of Mecklenburg, who by their aid succeeded in overthrowing the king and getting possession of the throne. For a time now the Cabinet had things nearly as they wished. In 1371 they forced the king to grant them all the royal estates as fiefs, and to declare that on the death of any one of them his successor should be chosen by the survivors. This astounding grant the Cabinet owed chiefly to the influence of their chancellor, Bo Jonsson, who had done more than any other to set Albert on the throne; and to him were granted as fiefs all the royal castles. In 1386 he died, leaving all his fiefs, by will, to the chief magnates of the land. Against this Albert ventured to protest. He called in a large number of his German countrymen, and by their aid recovered a large portion of his power. He then began distributing royal favors among them with a lavish hand, to the detriment of the Swedish magnates. These magnates therefore turned, in 1388, to Margaret, regent of Denmark and Norway, and offered her the regency of Sweden, promising to recognize as king whomever she should choose. In 1389 she entered Sweden with her army, overthrew King Albert, and got possession of the throne. In 1396 the Swedish Cabinet, at her desire, elected her nephew, Erik of Pomerania, already king of Denmark and Norway, to be king of Sweden; and on the 17th of June, 1397, he was crowned at Kalmar.[4] Thus began the celebrated Kalmar Union, one of the greatest political blunders that a nation ever made. It was the voluntary enslavement of a whole people to suit the whims of a few disgruntled magnates.