Ottoman Janissary Corps

Timeline

1. c. 1380–1385Edirne · ThraceMurad I organized youths recruited through the devshirme into a standing infantry directly under the sultan, calling them Janissaries and incorporating them into the Kapıkulu system, coordinating infantry with the timariot sipahi cavalry.
2. 1389Kosovo Polje · KosovoIn the 1389 Battle of Kosovo, the Janissaries fought in the decisive engagement as the sultan's guard infantry; although Murad I was killed in battle, the Ottoman army still won, and the new corps formation was validated in actual combat during the Balkan expansion.