When the Turkish government crushed an attempted coup on July 15, 2016, President Recep Tayyip Erdogan blamed supporters of Fethullah Gulen, a Muslim cleric in self-imposed exile in the United States. There were plenty of rumors about Gulen's involvement in the incident, yet the authorities in Ankara have so far failed to present conclusive evidence to prove this.
It is undisputed, however, that Gulen supporters previously held many positions in the Turkish state apparatus, which they used to their own advantage, and which Turkey's ruling Justice and Development Party (AKP) tolerated. That is, until Erdogan and Gulen had a falling out.
After Turkey's foiled coup, Erdogan ordered an unprecedented purge of the state apparatus. Some 100,000 civil servants were fired and 40,000 jailed. Most of these individuals are suspected members or sympathizers of the Gulen movement, or Hizmet.