During the 90s, the development EU's Common Foreign and Security Policy (CFSP) was given a strong impetus by the conflicts in the Balkans. The EU failed to react during the beginning of the conflict, and UN peacekeepers from the Netherlands failed to prevent the Srebrenica massacre (July 1995) in Bosnia and Herzegovina, the largest mass murder in Europe since the second world war. The North Atlantic Treaty Organization (NATO) finally had to intervene in the war, forcing the combatants to the negotiation table. On 14 December 1995, the Dayton Agreement was signed in Paris, ending the conflict in Croatia and Bosnia and Herzegovina.