Especially as a consequence of the termination of the Cold War, the détente in the relations between East en West (Gorbachev's ‘new thinking’ in foreign policy matters) and, finally, the disappearance of the Soviet Union, the number of UN peace-keeping operations substantially increased in recent years. One could even speak of a ‘proliferation’. Until 1988 the number of operations was twelve (seven peace-keeping forces: UNEF ‘I’ and ‘II’, ONUC, UNHCYP, UNSF (West New Guinea), UNDOF AND UNIFIL; and five military observer missions: UNTSO, UNMOGIP, UNOGIL, UNYOM and UNIPOM). Now, three forces and seven observer missions can be added. The forces are MINURSO (West Sahara), UNTAC (Cambodia) and UNPROFOR (Yugoslavia); the observer groups: UNGOMAP (Afghanistan/Pakistan), UNIIMOG (Iran/Iraq), UNAVEM ‘I’ and ‘II’ (Angola), ONUCA (Central America), UNIKOM (Iraq/Kuwait) and ONUSAL (El Salvador). UNTAG (Namibia), which was established in 1978, could not become operational until 1989 as a result of the new political circumstances in the world. So, a total of twenty-three operations have been undertaken, of which almost fifty percent was established in the last five years, whereas the other half was the result of decisions taken by the United Nations in the preceding forty years (UNTSO dates back to 1949). In the meantime, some ‘classic’ operations are being continued (UNTSO, UNMOGIP, UNFICYP, UNDOF, and UNIFIL), whereas some ‘modern’ operations already have been terminated as planned (UNTAG, UNGOMAP, UNIIMOG, UNAVEM ‘I’ and ‘II’, and ONUCA). At the moment (July 1992) eleven operations are in action – the greatest number in the UN history ever.