In 1948, where did the United Nations first use peacekeeping forces? in the Arab-Israeli War
in a rebellion in Haiti
in a civil war in Libya
in the Nazi occupation of France

in the Arab-Israeli War

Explanation:

The first UN peacekeeping mission was a team of observers deployed to the Middle East in 1948, during the 1948 Arab–Israeli War.

The earliest armed peacekeeping operation was the First UN Emergency Force (UNEF I) deployed successfully in 1956 to address the Suez Crisis. The UN Operation in the Congo (ONUC), launched in 1960, was the first large-scale mission having nearly 20,000 military personnel at its peak.