Due to the efficiency of Husrev-beg, other district (ie frontier and inland) governors of Rumelia began to imitate him.

The majority are Turks and they were chosen from among the peoples living in Rumelia.

[2] The unit was first established in Rumelia Eyalet around the middle of the 15th century to create a force to protect the borders of the empire in the Balkans and came to full power around the 16th century.

Sultan Mahmud II abolished the unit in 1829, along with the disbandment of the Janissaries, in attempts to reform the army and establish one in the Western model.

In the Turkish movie, Deliler Fatih'in Fermanı: directed by Osman Kaya, a small group of Delis is sent to Wallachia in order to kill the Romanian Prince Vlad the Impaler.