Failure to agree a common defence strategy risks emboldening Vladimir Putin. The squabbles have to stop Failure to agree a common defence strategy risks emboldening Vladimir Putin. The squabbles have to stop T he closer Russia’s hybrid war comes to European capitals, the less EU leaders seem able to agree on how to respond. That, at least, was the worrying impression left by a dissonant EU summit in Copenhagen. Summoned last week to build consensus on the top priorities for European rearmament,