United Nations Security Council resolution 689, adopted unanimously on 9 April 1991, after recalling Resolution 687 (1991), the council noted a report by the Secretary-General and decided to establish the [United Nations Iraq–Kuwait Observation Mission](https://bliptext.com/articles/united-nations-iraq-kuwait-observation-mission) to monitor the demilitarized zone between Iraq and Kuwait, known as the Kuwait–Iraq barrier. Acting under Chapter VII of the United Nations Charter, the council established the Mission for an initial period of six months, deciding to review the question of its termination every six months. Its presence was to deter border violations and monitor hostile or potentially hostile action mounted by either country against the other.