Organizations
UNTSO
UNTSO is the United Nations Truce Supervision Organization in the Middle East. Established in 1948, it is the UN's first and oldest peacekeeping mission and remains active.
Last updated: October 2026
| Field | Details |
|---|---|
| Operation | United Nations Truce Supervision Organization (UNTSO) |
| Location | Middle East (headquarters at Jerusalem) |
| Established | 29 May 1948 (UN Security Council Resolution 50) |
| Mandate | Monitor ceasefires and armistice agreements in the Middle East, prevent isolated incidents from escalating, and assist UNDOF and UNIFIL |
| Status | Active — the first and oldest United Nations peacekeeping mission |
| Type | United Nations peacekeeping operation — it has no member countries; its observers are unarmed |
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UNTSO is the United Nations Truce Supervision Organization in the Middle East — not a membership organization. Established in 1948, it is the UN's first and oldest peacekeeping mission and remains active.
What is UNTSO?
UNTSO is the United Nations Truce Supervision Organization, established in 1948 to monitor ceasefires and armistice agreements in the Middle East. It is the UN's first and oldest peacekeeping mission.
Is UNTSO still active?
Yes. UNTSO remains active, monitoring ceasefires in the Middle East and assisting UNDOF and UNIFIL.