Following a dynastic fracture in the monarchy of Hungary and Croatia, Mladen's father Paul emerged as a powerful oligarch who asserted sovereign rule over all of Croatia and Dalmatia, whose territories he distributed among his family members.
He ruled from his seat in the fortified town of Bribir, where he erected, along with his castle, the three-aisled basilica of St. Mary inside the Franciscan convent.

After the extinction of the Árpád dynasty, Paul had the Angevins brought to the throne, although their power over the land held by the Šubić family was merely nominal throughout the entirety of their administration.
Paul took extensive campaigns and significantly expanded his dominion eastward, over Bosnia and Hum, and also warred successfully against the Republic of Venice, taking the Dalmatian capital Zadar.
He was the most powerful Croatian noble at the end of the 13th century and beginning of the 14th century.
He also issued his own coin.
Following a dynastic fracture in the monarchy of Hungary and Croatia, Mladen's father Paul emerged as a powerful oligarch who asserted sovereign rule over all of Croatia and Dalmatia, whose territories he distributed among his family members. He ruled from his seat in the fortified town of Bribir, where he erected, along with his castle, the three-aisled basilica of St. Mary inside the Franciscan convent.
After the extinction of the Árpád dynasty, Paul had the Angevins brought to the throne, although their power over the land held by the Šubić family was merely nominal throughout the entirety of their administration. Paul took extensive campaigns and significantly expanded his dominion eastward, over Bosnia and Hum, and also warred successfully against the Republic of Venice, taking the Dalmatian capital Zadar. He was the most powerful Croatian noble at the end of the 13th century and beginning of the 14th century. He also issued his own coin.
Mladen II Šubić of Bribir