There is no 'massive' failure in the EU to protect itself as it has no such objective nor a mandate to protect itself. It's up to individual countries to spend on their armed forces as was up to Britain to spend when it was part of it and the EU didn't stop it, it did so just fine. If the US did not exist that would have been taken into account by the member countries themselves and acted accordingly.
> Instead - UK, Turkey, Ukraine, Finland, Georgia, Switzerland will possibly join the 'expanded' EU (by another name), which will mostly be trade focused. The interesting thing about that however, the other nations, notably Spain, Italy, Greece will definitely start to wonder about 'the grass being greener' in those countries.
Spain, Italy and Greece have all joined the Eurozone (Italy is a founding member btw) for their own good reasons. If they wanted less integration they could have not adopted the Euro just like a number of other countries. People seem to forget what inflation looked like for their national currencies of these countries before getting the Euro and it was not very green.