The United Nations Observer Mission in Angola (MONUA) was established by the Security Council resolution 1118 (1997) of 30 June 1997 with an overall mandate to assist the Angolan parties in consolidating peace and national reconciliation, enhancing confidence-building and creating an environment conducive to long-term stability, democratic development and rehabilitation of the country. MONUA took over from the United Nations Verification Mission in Angola III (UNAVEM III). Headquarters were located in Luanda, Angola. The mandates were extended several times. The mission consisted of political, police, human rights, military and humanitarian matters. MONUA ended on 26 February 1999 following the Security Council resolution 1229 (1999). The Special Representatives of the Secretary-General and Chiefs of Mission were Mr Alioune Blondin Beye (Mali) from June 1997 to June 1998, who died on 26 June 1998 with five other UN staff and two pilots in a plane crash, and Mr. Issa B. Diallo (Guinea) from August 1998 to February 1999. The Force Commanders were Major-General Phillip Valerio Sibanda (Zimbabwe) between June 1997 and April 1998, Major-General Seth Kofi Obeng (Ghana) from May 1998 and February 1999. On 15 October 1999, the Security Council authorized, by its resolution 1268, the establishment of the United Nations Office in Angola (UNOA) to liaise with the political, military, police and other civilian authorities in that country.