From 1978 until 2025, the Republic of Turkey was in an armed conflict with the Kurdistan Workers' Party (PKK) (Kurdish: Partiya Karkerên Kurdistanê) as well as its allied insurgent groups, both Kurdish and non-Kurdish. The initial core demand of the PKK was its separation from Turkey to create an independent Kurdistan. Later on, the PKK abandoned separatism in favor of autonomy and/or greater political and cultural rights for Kurds inside the Republic of Turkey.
Although most of the conflict took place in Northern Kurdistan, which corresponded with southeastern Turkey, the Kurdish-Turkish conflict spread to many other regions. The PKK's presence in Iraqi Kurdistan resulted in the Turkish Armed Forces carrying out frequent ground incursions and air and artillery strikes in the region, and its influence in Syrian Kurdistan led to similar activity there. The conflict costed the economy of Turkey an estimated $300 to 450 billion, mostly in military costs. It also had negative effects on tourism in Turkey.