Resolution 687 created a demilitarized zone on the Iraq-Kuwait boundary and resolution 689 set up UNIKOM with 300 observers

Background

United Nations Peacekeeping records that on 3 April 1991 the Security Council adopted resolution 687 (1991), setting detailed conditions for a formal ceasefire and establishing a demilitarized zone along the boundary between Iraq and Kuwait, to be monitored by a United Nations observer unit.
On 9 April 1991, by resolution 689 (1991) and acting under Chapter VII of the Charter, the Council established the United Nations Iraq-Kuwait Observation Mission, UNIKOM, with a strength of 300 military observers.
UNIKOM's mandate was to monitor the demilitarized zone and the Khawr Abd Allah waterway between Iraq and Kuwait, to deter violations of the boundary and to observe any hostile action mounted from the territory of one State against the other.
The Council decided that the mission's modalities would be reviewed every six months without a formal decision for extension, so that only its termination required a formal decision, subject to the concurrence of all the permanent members.
The advance party arrived on 13 April 1991 and the mission was fully deployed by 6 May; the demilitarized zone came into effect on 9 May 1991.
During the setting-up phase UNIKOM included five infantry companies drawn from the peacekeeping forces in Cyprus and Lebanon, which were withdrawn by the end of June 1991.