How will Brexit shape conflict resolution between the UK and other European countries?

How will Brexit shape conflict resolution within and between EU member states? In this post, Johannes Karreth (Ursinus College) observes that Brexit may pose a challenge not only to peace in Ireland but also for disputes between the UK and other European countries, such as the recent Franco-British "scallop war", that the EU has helped to keep at bay. He concludes that after Brexit there will be a great need for subsequent international agreements to make up for the loss of the EU institutional framework for conflict resolution and prevention.