Final answer:
The enslavement of young men from Balkan villages and their placement into state service was known as the Janissary system. It was implemented by the Ottoman Empire as a form of taxation on Christian territories and created a highly loyal and disciplined military force.
Step-by-step explanation:
The system of enslaving young men from villages in the Balkans and putting them into state service was known as the Janissary system.
The Janissary system was implemented by the Ottoman Empire as a form of taxation on Christian territories under its control. Boys between the ages of eight and ten were taken from specified villages, converted to Islam, and given education and military training to become an elite military force in service to the sultan.
This system created a highly loyal and disciplined force, known as the Janissaries, who served as bodyguards to the sultan and held important positions within the empire.