However, Erik's actions in the first half of 1568 were likely to arouse John's fears that his newly won freedom would be taken away from him again. John therefore entered into an agreement with his brother Charles and some of the nobility for a joint rising against Erik's hated regiment. This revolt began in July and spread so rapidly that by mid-September the army of the dukes was already outside Stockholm, whose gates were opened to them on 29 September 1568. An important ally was John's maternal uncle Sten Leijonhufvud, who was fatally wounded. At deathbed he was made Count of Raseborg. Erik XIV was taken prisoner, and immediately afterwards John had himself hailed as king by the city authorities and by those of the nobility and warriors who were gathered there. Shortly after this John executed his brother's most trusted counsellor, Jöran Persson, whom he held largely responsible for his harsh treatment while in prison.
However, Erik's actions in the first half of 1568 were likely to arouse John's fears that his newly won freedom would be taken away from him again. John therefore entered into an agreement with his brother Charles and some of the nobility for a joint rising against Erik's hated regiment. This revolt began in July and spread so rapidly that by mid-September the army of the dukes was already outside Stockholm, whose gates were opened to them on 29 September 1568. An important ally was John's maternal uncle Sten Leijonhufvud, who was fatally wounded. At deathbed he was made Count of Raseborg. Erik XIV was taken prisoner, and immediately afterwards John had himself hailed as king by the city authorities and by those of the nobility and warriors who were gathered there. Shortly after this John executed his brother's most trusted counsellor, Jöran Persson, whom he held largely responsible for his harsh treatment while in prison.