Question on releasing nations

[BoilerATC]

I'm new to the game, I started a campaign as the Ottomans and was watching a playthrough on YouTube to get some ideas on what to do. They said to release Syria to get it's cores. A couple of questions. How do I know that I should release a nation? I mean, what would prompt me as a new player to know to release Syria to get it's cores? What are the requirements to release a nation and get it's cores? Thank you.

 

[Guibou]

You have to plan a bit. To know wich nations are worth is by the amount of provinces they have core on (you can see this in the province window). Why ? When you do a reconquest war you get only 25% of the agresive expension and 25% of the cost for those provinces. How? You could diplo vassalize a nation that used to be big or release a new one. In the peace treaty, you only take one syrian provinces for yourself, dont core it but release syria as a vassal. Next war you chose reconquest CB. Syria is worth it because they have 7-8 provinces of high dev. Under 5 provinces I wouldnt take the time to do it.

 

[Guibou]

There's a recent feature that if you put your mouse on a core in the province window you can see all that nation's core highlighted on the map so its way faster then before.

Other releasable that you should check with ottoman is Irak, Sicily, naple(if integrated by spain), hungry (if integrated by austria), ajam (if integrated by timurids).