Erik believed that
Vadstena would be the first target for the rebels, as it was a good place to assemble troops, and he wrote to it explaining how the garrison should not let the rebels inside, but it was too late. On 12 July, John and Charles captured Vadstena turning it into their headquarters and gaining control over a large part of
Östergötland along with a strong connection by sea to
Västergötland. The uprising had officially began. In his
almanac on 20 July, Erik writes of the so called
Rebellio (rebellion). Erik's uncle,
Sten Eriksson, joined the side of the rebels, and together they began marching on Stockholm where Erik had assembled the estates, declaring a proclamation that the rebels were traitors who would be defeated. Regular troops stationed in Östergötland quickly renounced their oaths to Erik and swore oaths to Duke Charles. However, Erik Still had control of the entire fleet and its crew. Erik believed that John and Charles were going to join the Danes, and met the uprising by trying to reinforce Varberg and Kalmar in order to deny John and Charles any chance of going to Frederick II. However, this was not their intention, and wished to see them defeated just like John. However, they did secure a truce with Denmark for three months in order to focus on Erik. of Duke Charles in 1596 by Hieronymus Nützel Erik had hoped that the relationship between Charles and John could be splintered, and while agreement with John was unlikely, it was different with Charles. This is because Erik had been responsible for Charles when he became king, and managed Charles' education and kept him close. After realizing Charles' involvement in the uprising, he wrote to him and reminded him of the oath he had sworn. If Charles refused, Erik wanted them to meet in a duel to solve the matter. In his response, Charles wrote that if Erik wished to meet, he just needed to come to him. Charles' response also explained that the uprising was not against Sweden, rather against Erik himself for his "unchristian government" along with giving
Jöran Persson power. Instead of any agreements being signed, John and Charles continued their march to
Stockholm. The rebels chose John as
riksföreståndare, and by August, the rebel army is estimated to have been some 7,000–8,000 men in total. In his response to Charles, Erik wrote: The rebel army soon conquered
Stegeborg and
Nyköping, and the clergy at the
Diocese of Linköping hailed John as their "true lord," and the congregations throughout
Västergötland slowly swore allegiance to the Duke. The Estates in Stockholm quickly made a proclamation against the rebels, with death sentences being given to the Dukes and their supporters. By the end of July, eight banners of cavalry and 18
fähnleins of infantry, commanded by
Åke Bengtsson Färla and Gisle Nilsson had promised to support Erik but were convinced to not do so by the dukes. Erik attempted an attack on Nyköping but was repulsed by Duke Charles, and he returned to Stockholm. When the rebel army approached the Mälaren in August, they encountered Erik's troops in Hölö forest, who were quickly repulsed.
Battle of Botkyrka In response to the rebel approach towards Stockholm and defeat at Hölö, Erik assembled his drabants and lead them out to engage the rebels head on. He led them in a similar approach to when Danish general
Daniel Rantzau was expelled from Sweden, and he was far more successful this time. When Erik's forces, estimated at 6,000 men, showed up at Botkyrka on 31 August. He quickly sent his vanguard of 700 men towards the much stronger rebel force led by
Pontus De la Gardie estimated at 1,190 men in total. He quickly overwhelmed it, forcing it to retreat to Södertälje. He had now won a total victory, and it was the only instance where he led troops in a regular battle and won. During their retreat, the rebels captured
Gripsholm Castle.
Siege and capitulation of Stockholm of Jöran Persson's execution by
Jan Luyken After being repulsed from Botkyrka, the rebels instead went around Mälaren Valley and conquered Västerås,
Örebro, and Uppsala. After this, the rebels reached the city gates of Stockholm on 17 September. In the following fighting, many people loyal to Erik betrayed him after he showed signs of defeat and fled to the rebel camp, including people like
Per Brahe and
Klas Fleming, along with
Queen dowager Katarina. The city was shortly besieged, during which Erik tried to do a sortie, which failed. During the siege, John and Charles demanded that
Jöran Persson be handed over, which was granted by Olof Larsson after Persson had been arrested. After the rebels received him, they began torturing him for information along with Erik's plans. However, Jöran refused to reveal anything and was later brutally tortured again and later decapitated on
Galgbacken on 22 September on charges of negatively affecting Erik. On 28 September, John convinced Erik to open the city gates, and on the next day troops commanded by Sten Eriksson marched into Stockholm, and there was one last battle between Erik's forces and the rebels on
Stortorget, during which Eriksson was mortally wounded. Along with Eriksson,
Anders Sigfridsson and Pontus De la Gardie were wounded in the back and arm respectively. During the confusion that followed, Erik managed to flee into Stockholm Castle with his forces, but quickly surrendered himself to John after a demand by Duke Charles. Following his surrender, several of his loyalists were executed, like the secretary Per Hansson, and Krister Persson. Per Brahe also convinced the garrison of the castle to surrender, and on 29 September, Duke John marched into Stockholm with his forces. == Aftermath ==