UN Peacekeepers Face Tough, New Challenges UNITED NATIONS PEACE-KEEPING FORCES AND OBSERVER MISSIONS

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SO popular are United Nations peacekeepers these days that the world body can hardly keep pace with the demand.

All those troops, police, and civilians now heading for Cambodia and Yugoslavia will bring the global ranks of UN peacekeepers to an all-time high of about 50,000, a fourfold jump since the start of the year. Somalia and Azerbaijan's Nagorno-Karabakh could be next.

The scope of peacekeeping in the newly energized United Nations is also broadening. The soldier wearing the UN blue beret is no longer just a monitor of a cease-fire. The peacekeeping operation in Cambodia will attempt the broadest array of tasks ever - from administering the country and …