The Kurdistan Workers' Party or PKK is a Kurdish militant political organization and armed guerrilla movement which historically operated throughout Kurdistan but is now primarily based in the mountainous Kurdish-majority regions of southeastern Turkey and northern Iraq. Since 1984, the PKK has been involved in asymmetric warfare in the Kurdish–Turkish conflict (with several ceasefires between 1993 and 2013–2015).
https://en.wikipedia.org/wiki/Kurdistan_Workers%27_Party