Ottoman forces captured the commercial center of Sofia in 1385. Serbia, then the strongest Christian power in the Balkans, was decisively defeated by the Ottomans at the Battle of Kosovo Polje in 1389, leaving Bulgaria divided and exposed. Within ten years, the last independent BulgariÍÍÍÍan outpost was captured. Bulgarian resistance continued until 1453, when the capture of Constantinople gave the Ottomans a base from which to crush local uprisings. In consolidating its Balkan territories, the new Ottoman political order eliminated the entire Bulgarian state apparatus. The Ottomans also crushed the nobility as a landholding class and potential center of resistance. The new rulers reorganized the Bulgarian church, which had existed as a separate patriarchate since 1235, making it a diocese under complete control of the Byzantine Patriarchate at Constantinople. The sultan, in turn, totally controlled the patriarchate.

The Ottomans ruled with a centralized system much different from the scattered local power centers of the Second Bulgarian Empire. The single goal of Ottoman policy in Bulgarian territory was to make all local resources available to extend the empire westward toward Vienna and across northern Africa. Landed estates were given in fiefdom to knights bound to serve the sultan. Peasants paid multiple taxes to both their masters and the government. Territorial control also meant cultural and religious assimilation of the populace into the empire. Ottoman authorities forcibly converted the most promising Christian youths to Islam and trained them for government service. Called pomaks, such converts often received special privileges and rose to high administrative and military positions. The Ottoman system also recognized the value of Bulgarian artisans, who were organized and given limited autonomy as a separate class. Some prosperous Bulgarian peasants and merchants became intermediaries between local Turkish authorities and the peasants. In this capacity, these chorbadzhi (squires) were able to moderate Ottoman policy. On the negative side, the Ottoman assimilation policy also included resettlement of Balkan Slavs in Asia Minor and immigration of Turkish peasants to farm Bulgarian land. Slavs also were the victims of mass enslavement and forcible mass conversion to Islam in certain areas.

Data as of June 1992