That seems to be deviating quite a lot from the concept of the existence of EU causing wars, as you suggested in the message I answered. By a few decades for North Cyprus (or 100+ years, depending from your definition of that conflict) a few centuries in the case of North Ireland.
Ukraine did not control Crimea, Donetsk and Lugansk for almost a decade. The north cyprus / north ireland situation existed before the war, which does look idiotic to me presently.
Or did I misunderstand what you wrote?