The EU integration has certainly helped, but so has the fact that Western Europe no longer has any super power nations and no single country with an overwhelmin

The EU integration has certainly helped, but so has the fact that Western Europe no longer has any super power nations and no single country with an overwhelming advantage. For the last 50 years the US has towered over everybody in Western Europe militarily. The US shouldering the military burden has reduced European military build-up and capacity. Effectively the same thing it has done regarding Japan (you can argue whether that's good or bad). Who's going to try to assault France or Britain anyway? They have substantial nuclear weapons capability. They'd wipe out Germany in one launch round. Then besides Germany, who else in Western Europe could even be a credible threat to peace? Nobody. So long as Britain and France have long range strike capability with nukes it'd be impossible to win a war against them, and all but makes an EU war pointless. Nobody wants to get into a war that is literally impossible to win.