Member states of the United Nations the membership of the USSR in the Security Council and all other UN organs was being continued by the Russian Federation with the support of the 11 member countries of the Commonwealth of Independent States. The other fourteen independent states established from the former Soviet Republics were all admitted to the UN: Both Egypt and Syria joined the UN as original members on 24 October 1945. Following a plebiscite on 21 February 1958, the United Arab Republic was established by a union of Egypt and Syria and continued as a single member. On 13 October 1961, Syria, having resumed its
Member states of the United Nations two states merged to form the single member "United Republic of Tanganyika and Zanzibar", with its name changed to the United Republic of Tanzania on 1 November 1964. The Union of Soviet Socialist Republics (USSR) joined the UN as an original member on 24 October 1945, and as set out by the United Nations Charter, Chapter V, Article 23, became one of the five permanent members of the United Nations Security Council. Upon the imminent dissolution of the USSR, in a letter dated 24 December 1991, Boris Yeltsin, the President of the Russian Federation, informed the United Nations Secretary-General that