devşirme

thumb|304x304px|Illustration of an Ottoman official and his assistant registering Christian boys for the devshirme. The official takes a tax to cover the price of the boys' new red clothes and the cost of transport from their home, while the assistant records their village, district and province, parentage, date of birth and physical appearance. Ottoman miniature painting, 1558.

Devshirme (, usually translated as "child levy" or "blood tax") was the Ottoman practice of forcibly recruiting soldiers and bureaucrats from among the children of their Balkan Christian subjects and raising them in the religion of Islam. Those coming from the Balkans came primarily from noble Balkan families and rayah classes. It is first mentioned in written records in 1438, but probably started earlier. It created a faction of soldiers and officials loyal to the Sultan. It counterbalanced the Turkish nobility, who sometimes opposed the Sultan.