ACE Allied Command Europe ARRC Allied Command Europe Rapid Reaction Corps CIS Commonwealth of Independent States CJTF Combined Joint Task Force CSCE Conference on Security and Cooperation in Europe (now Organisation for Security and Cooperation in Europe -OSCE) ECOMOG ECOWAS (Economic Community of West African States) peacekeeping force in Liberia EU European Union NATO North Atlantic Treaty Organisation PFP Partnership for Peace ROE rules of engagement SACEUR Supreme Allied Commnader Europe SACLANT Supreme Allied Commander Atlantic SHAPE Supreme Headquarters Allied Powers Europe UN United Nations UNHQ United Nations headquarters WEU Western European Union