- 87,648
- Rule 12
- GTP_Famine
The European Union didn't come into existence until the implementation of the Maastricht Treaty on November 1st 1993. At that point, the member states and their previous involvement in conflicts were:It would be fairer to say "amongst member states" for the EU and preceding EEC.
I don't think many people claim that the EU/EEC have kept all of Europe safe from war but with the exception of Northern Ireland, it hasn't done too badly for its member states and even then, the island of Ireland being detached from the mainland kept those Troubles well away from anywhere else, if anyone else cared at all.
The end of communist rule might have been a revolt but the 1992 dissolution of Czechoslovakia into Czechia and Slovakia was peaceful. And for the other places, as mentioned they are not member states or were not at the time.
Belgium - WW2, 1945 (48y)
Denmark - WW2, 1945 (48y)
France - WW2, 1945 (48y)*
Germany - WW2, 1945 (48y)*
Greece - WW2, 1945 (48y)
Ireland - Creation, 1948 (45y)*
Italy - WW2, 1945 (48y)
Luxembourg - WW2, 1945 (48y)
Netherlands - WW2, 1945 (48y)
Portugal - WW2, 1945 (48y)
Spain - WW2, 1945 (48y)*
United Kingdom - WW2, 1945 (48y)*
The situations in asterisked countries is... askew. Ireland was technically neutral in WW2, but was also not officially a nation until 1949, when the Republic of Ireland act came into force. Prior to that, its last conflict was technically the Civil War in 1923, but there's also "The Troubles" to take into act - which folds the UK into its action. Spain is awkward, because it was a fascist dictatorship through to 1978, and there's also Basque separatism - and more recently Catalonian separatism - which brings France into the picture too. France also has Corsican nationalism to contend with, even today, and Gilets Jaunes is becoming classed as "an ongoing conflict". Germany is hilariously complex. West Germany, of course, has zero conflict history since the end of WW2, but that stuff with East Germany just makes things weird.
Nonetheless, it's fairly safe to say that the 12 original member states had no state-sponsored external conflict with any of the other 12 member states at any point in the 48 years between VE Day and 1/11/93. That's continued for the 26 years since too.
It's a vast overstatement to say that the EU has "successfully kept peace in Europe for the longest time in centuries", because it's beaten by the period immediately preceding it, by almost double. I'm also not sure what the mechanism is for the EU's peacekeeping role - we know it has no army yet, because that was one of the key threats in the Brexit discussion.