Another mutiny emerged within the city of Šibenik in 1319, the most loyal city towards the Šubić family.
The causes of it are not known, but it is known that the commune requested mediation by Venice.
The rebellion was taken very seriously by Mladen, as it offered an opportunity for Venice to meddle in Mladen's affair directly, although it was already crushed before they could act diplomatically.
He imprisoned the leaders of the rebellion Koza of Ilija, under the accusations of conspiring against his life.
Mladen's fall began with the second rebellion of Šibenik in 1321/1322, which was soon joined by Trogir.
Mladen first attacked and pillaged Šibenik's surroundings, which was followed by laying siege to the city itself.
He ordered Koza's brothers to be brought before the city and executed in clear sight.
This act only deepened the conflict and provoked other members of the Croatian nobility to mutiny, including his younger brother Paul II, who was at the time Duke of Trogir.
The rebellion of the cities received support from Venice and in March 1322, Šibenik accepted Venetian rule, who in turn sent a fleet to defend it from Mladen's attempts at retribution.
Paul II and the city of Trogir made an alliance with the goal of deposing Mladen and replacing him with Paul.
Despite this, Trogir also accepted Venice's supremacy, declaring that its loyalty belongs to Charles I of Hungary, its natural master.
This forced Mladen to convene an assembly of the Croatian nobility in order to gain support and tone down the tensions with the Dalmatian cities.
The attempt was unsuccessful, as the assembly ended with even more animosity of the rest of the nobility towards him.

The conflict gave pretext to king Charles, who eliminated the oligarchic powers in Hungary by then, in restoring royal power in Croatia, since he disputed Mladen's rule over these lands.
The king named a new Ban of Croatia John Babonić and then departed together with him to face Mladen.
The first battle took place in the vicinity of Šibenik, in which Mladen's troops were defeated, forcing him to withdraw to the south.
The armies of Trogir, Šibenik and Venice, the pillaged the city of Skradin.
The second and final battle occurred in Blizna near Klis Fortress.
Mladen's army consisted of his own troops, those of his brother George II's, as well as Vlachs and those from lesser nobility of the Poljica region.
The opposing army were royal troops under John Babonić in coalition with the Croatian nobility (including Paul II Šubić) and the militia of Trogir and Šibenik.
The battle resulted in the victory for the coalition, forcing Mladen further south into Klis Fortress.

In the Klis Fortress, Mladen received news of the king's arrival in Knin, which prompted him to send his younger brother George II as a diplomat with intent to negotiate.
Charles I received George very diligently and gave his assurance for Mladen to arrive personally to Knin.
Despite the king's previous promises, when Mladen arrived, he was imprisoned and taken alongside the king to Hungary, where he lived in captivity under unknown circumstances.
It is possible that his daughter Catherine was also taken.
He is assumed to have died around the year 1341.

As a result, the king gave Stephen II Kotromanić Bosnia and Dalmatia from Cetina to Dubrovnik.
Mladen's former court member and conspirator, Ivan Nelipić, used the opportunity to seize Knin from the royal forces.
After Mladen II's defeat, the Šubić family not only lost Bosnia, but also lands in Croatia, and lost forever its previous influence.
Mladen II was succeeded by his brother George and subsequently his nephew Mladen III Šubić as heads of the Šubić family, who continued to rule over Klis, Skradin and Omiš until 1348.
Another mutiny emerged within the city of Šibenik in 1319, the most loyal city towards the Šubić family. The causes of it are not known, but it is known that the commune requested mediation by Venice. The rebellion was taken very seriously by Mladen, as it offered an opportunity for Venice to meddle in Mladen's affair directly, although it was already crushed before they could act diplomatically. He imprisoned the leaders of the rebellion Koza of Ilija, under the accusations of conspiring against his life. Mladen's fall began with the second rebellion of Šibenik in 1321/1322, which was soon joined by Trogir. Mladen first attacked and pillaged Šibenik's surroundings, which was followed by laying siege to the city itself. He ordered Koza's brothers to be brought before the city and executed in clear sight. This act only deepened the conflict and provoked other members of the Croatian nobility to mutiny, including his younger brother Paul II, who was at the time Duke of Trogir. The rebellion of the cities received support from Venice and in March 1322, Šibenik accepted Venetian rule, who in turn sent a fleet to defend it from Mladen's attempts at retribution. Paul II and the city of Trogir made an alliance with the goal of deposing Mladen and replacing him with Paul. Despite this, Trogir also accepted Venice's supremacy, declaring that its loyalty belongs to Charles I of Hungary, its natural master. This forced Mladen to convene an assembly of the Croatian nobility in order to gain support and tone down the tensions with the Dalmatian cities. The attempt was unsuccessful, as the assembly ended with even more animosity of the rest of the nobility towards him.
The conflict gave pretext to king Charles, who eliminated the oligarchic powers in Hungary by then, in restoring royal power in Croatia, since he disputed Mladen's rule over these lands. The king named a new Ban of Croatia John Babonić and then departed together with him to face Mladen. The first battle took place in the vicinity of Šibenik, in which Mladen's troops were defeated, forcing him to withdraw to the south. The armies of Trogir, Šibenik and Venice, the pillaged the city of Skradin. The second and final battle occurred in Blizna near Klis Fortress. Mladen's army consisted of his own troops, those of his brother George II's, as well as Vlachs and those from lesser nobility of the Poljica region. The opposing army were royal troops under John Babonić in coalition with the Croatian nobility (including Paul II Šubić) and the militia of Trogir and Šibenik. The battle resulted in the victory for the coalition, forcing Mladen further south into Klis Fortress.
In the Klis Fortress, Mladen received news of the king's arrival in Knin, which prompted him to send his younger brother George II as a diplomat with intent to negotiate. Charles I received George very diligently and gave his assurance for Mladen to arrive personally to Knin. Despite the king's previous promises, when Mladen arrived, he was imprisoned and taken alongside the king to Hungary, where he lived in captivity under unknown circumstances. It is possible that his daughter Catherine was also taken. He is assumed to have died around the year 1341.
As a result, the king gave Stephen II Kotromanić Bosnia and Dalmatia from Cetina to Dubrovnik. Mladen's former court member and conspirator, Ivan Nelipić, used the opportunity to seize Knin from the royal forces. After Mladen II's defeat, the Šubić family not only lost Bosnia, but also lands in Croatia, and lost forever its previous influence. Mladen II was succeeded by his brother George and subsequently his nephew Mladen III Šubić as heads of the Šubić family, who continued to rule over Klis, Skradin and Omiš until 1348.
Mladen II Šubić of Bribir