Did you not get as far as the sentence immediately following the one you quoted? I listed a bunch of likely reasons for there being no War between EU countries.

Did you not get as far as the sentence immediately following the one you quoted? I listed a bunch of likely reasons for there being no War between EU countries. Just because the EU happened to exist during a period of peace, does not mean it is the reason for it. There was a little thing called World War 2 that may also have played a part.