- 1959 - 1964
Series consists of United Nations Operation in the Congo records of both Secretaries-General Hammarskjold (1953-1961) and U Thant. U Thant became Acting Secretary-General on 3 November 1961 he was appointed Secretary-General on 30 November 1962. The records were created in the course of political military and support activities relating to peacekeeping operations in the Congo during this period. In addition to subject files there is a set of Secretary-General Hammarskjold's correspondence with member states pertaining to the problems in the Congo. After his accidental airplane death in the Congo on 18 September 1961 interim officials including Acting Secretary-General U Thant kept subsequent Congo records files with Hammarskjold's. Included is Secretary-General U Thant's correspondence with member states pertaining to the problems in the Congo. In addition there is a set of U Thant's clear cables. Boxes 1 to 6 of this series are Hammarkskjold records while boxes 7 to 12 are U Thant records. Arranged in various sets of files as follows - correspondence and cables (to September 1961) correspondence with member states (to September 1961) then a set of 10 files on unrest, incidents etc. (14 July 1960 to 19 June 1961) Secretary-General U Thant's country files (predominantly to 1963) some of U Thant's subject files and his clear cables (November 1961 to June 1964).