Background -- ENDC negotiations (1964) Nonaligned developments -- First Chinese Communist test -- Disarmament Commission discussions (1965) -- Eighth session of the ENDC (1965) -- Twentieth General Assembly (1965) -- NATO and Warsaw Treaty arrangements -- Pastore resolutions -- Ninth session of the ENDC, January 27-May 10, 1966 -- Tenth session of the ENDC, June 14-August 25, 1966 -- Tenth General Conference of the IAEA, September 21-28, 1966 -- Twenty-first General Assembly (1966) -- Concerns of non-nuclear-weapon nations -- Draft nonproliferation treaty, August 24, 1967 -- Report by Secretary-General Thant, October 10, 1967 -- Twenty-second General Assembly (Part I) -- Thirteenth session of the ENDC, January 18-March 14, 1968 -- Twenty-second General Assembly (Part II) -- Security Council action on the Tripartite Assurances Proposal -- Signing of the treaty -- Documentary annex.