The focus tree is in development. I don't want to come up with something half-baked.

By losing the Kurdish Separatism national spirit through liberating all states claimed by Kurdistan without puppeting them.

Otherwise, containing the PKK is a tricky but realizable task, requiring you to use both brute force and compromise.
The following actions will reduce the likelihood of PKK attacks.
- Increasing your stability (40+),
- Increasing infrastructure in Sivas, Malatya, Van, Erzurum, Hasakah (if controlled), Iraqi Kurdistan (if controlled), Eastern Kurdistan (if controlled),
- Garrisonning divisions in Sivas, Malatya, Van, Erzurum, Hasakah (if controlled), Iraqi Kurdistan (if controlled), Eastern Kurdistan (if controlled),
- Having a communist or dem-soc government,
- Subjugating or puppeting Syria, Iraq, Iran, Lebanon, Armenia, Greece, Cyprus, USA, France, Germany and Italy,
- Destroying Qandil Mountain camps (event chain once you control Iraqi Kurdistan),
- Hiring an Internal Intelligence Officer and Prince of Terror,
- Bombing Qandil Mountain camps (event option).
- Having high Kurdish Political Movement (Progressive) popularity,

The following actions will increase the likelihood of PKK attacks.
- the PKK ending its unilateral ceasefire,
- going on war,
- executing Öcalan,
- not garrisonning divisions in Sivas, Malatya, Van, Erzurum, Hasakah (if controlled), Iraqi Kurdistan (if controlled), Eastern Kurdistan (if controlled),
- garrisonning too many divisions in Sivas, Malatya, Van, Erzurum, Hasakah (if controlled), Iraqi Kurdistan (if controlled), Eastern Kurdistan (if controlled) (terror bombings only),
- Having an islamist, nationalist, fascist or monarchist government.

The military will be ready to call for your resignation (or putsch you if you refuse) in the following situations:
- Your stability is Disastrous (less than 11),
- You have freed Kurdistan,
- One of the "subversive ideologies" (islamist, communist, democratic socialist, monarchist, progressive) either has 30% popularity or has 20% popularity and its first generic focus researched.
- You are 80% about to surrender in a war.

The following will reduce the likelihood of the military memorandum:
- Your ruling party has a higher popularity than 30%,
- You have hired an Internal Intelligence Officer,
- Your stability is higher than 50%
- The "subversive ideology" is more popular than 35%,
- Your army is smaller than 70 divisions: the smaller your army, the less likely the putsch.

Never getting coup'ed requires to lose the Military Tutelage national spirit by:
- changing your government to islamist, communist, demsoc, monarchist or progressive,
- purging the military (event, negative buff for x days depending on division numbers),
- getting the "Most of General Staff Resigns" event.