(UNEF II)
The second United Nations (UN) peacekeeping force inserted between Israel and Egypt. It was established by UN Security Council Resolution 340 on 25 October 1973 at the end of the Yom Kippur War. Unlike its predecessor, UNEF, which maintained relative peace and stability until it was unceremoniously withdrawn by Secretary General U Thant on 18 May 1967 at the request of Egypt, UNEF II could not be withdrawn unilaterally and without action by the Security Council. Its mandate was expanded to supervise the Israel-Egypt Disengagement of Forces Agreement signed at Kilometer 101 on 18 January 1974. On 24 July 1979, the Security Council declined to extend UNEF II's mandate, its functions having been superseded by the security provisions of the Egypt-Israel Peace Treaty of 26 March 1979.
Historical Dictionary of Israel. Bernard Reich David H. Goldberg. Edited by Jon Woronoff..