After his father's death in 1314 or 1315, Ladislaus IV declared himself the Voivode of Transylvania, a title even acknowledged by King Charles I of Hungary in a charter dated 12 August 1315.
[1] The monarch’s appointed voivode, Nicholas Pok, was unable to take office.
However, Ladislaus IV's power was soon challenged by another rebellious lord, Mojs II Ákos, the son-in-law of James Borsa.
[2] Mojs II defeated Voivode Pok, who had led a royal campaign against the Transylvanian oligarchs.
By 1321, Charles I’s newly appointed voivode, Thomas Szécsényi, captured Csicsó (present-day Ciceu-Corabia, Romania), which was the last stronghold of Ladislaus Kán's sons.