Fishing rights in the North Sea between the Nordic Nations and the British Isles. In fact, a conflict has already emerged, in the 1980s, between the United Kingdom and Iceland.
Russian expansionism in Eastern Europe. There is actually an ongoin conflict related to this factor, in Eastern Ukraine.
European dependency on Russia for enegry sources. Most of Europe gets its gas natural from Russia, because other than Russia, the rest of European countries are largely devoid of this important natural resource.
Internal separatist movements. There are several separatist movements in Europe: Catalonia in Spain, Scotland in the United Kingdom, Veneto in Italy, A dozen in the Caucasus, all being potential sources of conflict.
