In 1992, in response to the armed conflict between Armenian and Azerbaijan over the area of Nagorno-Karabakh the Organization for Security and Co-operation in Europe (OSCE) requested its participating states to impose an embargo on arms deliveries to forces engaged in combat in the Nagorno-Karabakh area.
The OSCE request has not been repealed. It is a voluntary multilateral arms embargo and a number of OSCE participating states have supplied arms to Armenia and Azerbaijan since 1992.