Among the principalities of that northern region the first place was long held by Novgorod.
At that time a number of principalities had replaced the Seljukian state.
The principalities of Aidin, Menteshe, Sarukhan and Kermian were annexed to Bayezid's dominions to punish their rulers for having joined with the 'Karamanian prince in rebellion.
Janissaries leisure to engage in plots against the sultan, and in order to occupy them and to remove them from the capital advantage was taken of the king of Poland having intervened in the affairs of Transylvania and the principalities to declare war against him.
During this period Bosnia became the generally accepted name for the valley of the Bosna (ancient Basanius); and subsequently for several outlying and tributary principalities, notably those of Soli, afterwards Tuzla; Usora, along the south-eastern bank of the Save; Donji Kraj, the later Krajina, Kraina or Turkish Croatia, in the north-west; and Rama, the modern district of Livno.