Basarab I

Basarab I unified the Romanian lands east of the Olt River and south of the Carpathians, establishing the independent principality of Wallachia. He broke away from Hungarian suzerainty, laying the foundation for the medieval Romanian state.

Basarab was initially recognized as a Hungarian vassal, receiving the title of Voivode from King Charles I. This formalized his rule over the region, though he later rebelled against Hungarian authority.

Basarab I defeated the Hungarian army of King Charles I at the Battle of Posada. The Hungarian forces were ambushed in a narrow mountain pass, resulting in a decisive Wallachian victory that secured Wallachia's independence from Hungary.

After the Battle of Posada, Basarab I extended Wallachian control to the Danube River, including the important fortress of Severin. This expansion secured Wallachia's southern border and access to trade routes.