The United Nations Disengagement Observer Force (UNDOF) is a United Nations peacekeeping mission tasked with maintaining the ceasefire between Israel and Syria in the aftermath of the 1973 Yom Kippur War. The mission was established by United Nations Security Council Resolution 350 on 31 May 1974, to implement Resolution 338 (1973) which called for an immediate ceasefire and implementation of United Nations Security Council Resolution 242.
The resolution was passed on the same day as the Agreement on Disengagement. It was signed by Israeli and Syrian forces on the Golan Heights, finally establishing a ceasefire to end the war. From 1974 to 2012, UNDOF performed its functions with the full cooperation of both sides. Since 1974 its mandate has been renewed every six months. The United Nations Truce Supervision Organization (UNTSO) and UNDOF operate in the UNDOF Zone, a demilitarized zone between the two sides and continue to supervise the ceasefire.
