stylistic:style_transfer, structural:reformatting, information:classification
Background

In 1314, Serbian King Stefan Milutin quarreled with his son, Stefan Uroš III. Milutin sent Dečanski to Constantinople to have him blinded, though he was never totally blinded. Dečanski wrote to Danilo, the bishop of Hum, asking him to intervene with his father. Danilo wrote to Archbishop Nicodemus of Serbia, who spoke with Milutin and persuaded him to recall his son. In 1320 Dečanski was permitted to return to Serbia and was given the appanage of 'Budimlje' (modern Berane), while his half-brother, Stefan Konstantin, held the province of Zeta.

Milutin became ill and died on 29 October 1321, and Konstantin was crowned king. Civil war erupted immediately, as Dečanski and his cousin, Stefan Vladislav II, claimed the throne. Konstantin refused to submit to Dečanski, who then invaded Zeta, defeating and killing Konstantin. Dečanski was crowned king on 6 January 1322 by Nicodemus, and his son, Stefan Dušan, was crowned "young king". Dečanski later granted Zeta to Dušan, indicating him as the intended heir. Since April 1326 Dušan appears in written sources as the "young king" and ruler in Zeta and Zahumlje. From that fact and the "Old Serbian genealogies and annals", in recent works, some Serbian historians write that Dusan was 14 years old probably in March, or April 1326, and that he was born in 1312, not around 1308.

In the meantime, Vladislav II mobilized local support from Rudnik, the former appanage of his father, Stefan Dragutin. Vladislav proclaimed himself king, and he was supported by the Hungarians, consolidating control over his lands and preparing for battle with Dečanski. As was the case with their fathers, Serbia was divided by the two independent rulers; in 1322 and 1323 Ragusan merchants freely visited both lands.

In 1323, war broke out between Dečanski and Vladislav. Rudnik had fallen to Dečanski by the end of 1323, and Vladislav appeared to have fled north. Vladislav was defeated in battle in late 1324 and fled to Hungary, leaving the Serbian throne to Dečanski as undisputed "king of All Serbian and Maritime lands".